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Python TypeError: list indices must be integers, not str
 
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Python TypeError: list indices must be integers, not str
Views: 11663 ATOM
Python Tutorial: Slicing Lists and Strings
 
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In this video we will look at how to slice lists and strings in Python. Slicing allows us to extract certain elements from these lists and strings. This can be extremely useful for stripping out certain values from lists or getting a substring of a characters from a string. Let's take a look at a few code examples. The code from this video can be found at: https://github.com/CoreyMSchafer/code_snippets/tree/master/Slicing ✅ Support My Channel Through Patreon: https://www.patreon.com/coreyms ✅ Become a Channel Member: https://www.youtube.com/channel/UCCezIgC97PvUuR4_gbFUs5g/join ✅ One-Time Contribution Through PayPal: https://goo.gl/649HFY ✅ Cryptocurrency Donations: Bitcoin Wallet - 3MPH8oY2EAgbLVy7RBMinwcBntggi7qeG3 Ethereum Wallet - 0x151649418616068fB46C3598083817101d3bCD33 Litecoin Wallet - MPvEBY5fxGkmPQgocfJbxP6EmTo5UUXMot ✅ Corey's Public Amazon Wishlist http://a.co/inIyro1 ✅ Equipment I Use and Books I Recommend: https://www.amazon.com/shop/coreyschafer ▶️ You Can Find Me On: My Website - http://coreyms.com/ My Second Channel - https://www.youtube.com/c/coreymschafer Facebook - https://www.facebook.com/CoreyMSchafer Twitter - https://twitter.com/CoreyMSchafer Instagram - https://www.instagram.com/coreymschafer/ #Python
Views: 82658 Corey Schafer
Python Tutorial: How To Use The List Index Method in Python
 
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Python 3.7 Version - https://youtu.be/_zZcivsR3nQ In this Python tutorial, we look at how to find the index position of a object in a list using the list index method in Python.
Views: 4706 Master Code Online
How To Index and Slice List In Python 3
 
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Be sure to like, share and comment to show your support for our tutorials. ======================================= Channel - https://goo.gl/pnKLqE Playlist For This Tutorial - https://goo.gl/EyZFti Latest Video - https://goo.gl/atWRkF Facebook - https://www.facebook.com/mastercodeonline/ Twitter - https://twitter.com/mastercodeonlin?lang=en Website - http://mastercode.online ====================================== In this Python tutorial, we will explain how to use index and slicing assignment in Python list to change the objects in a Python list.
Views: 2593 Master Code Online
Indexing List In Python
 
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Be sure to like, share and comment to show your support for our tutorials. ======================================= Channel - https://goo.gl/pnKLqE Playlist For This Tutorial - https://goo.gl/EyZFti Latest Video - https://goo.gl/atWRkF Facebook - https://www.facebook.com/mastercodeonline/ Twitter - https://twitter.com/mastercodeonlin?lang=en Website - http://mastercode.online ====================================== Indexing List In Python In this Python tutorial, we will teach you all about indexing list in Python. Indexing list in Python is a very important concept which gives us the ability to access our objects that appear in a list. List in Python can contain a lot of information that is important in order to run our programs and having a way to access the content within a list allows us to use the content as it is needed when our program runs. Indexing allows us to access one object and slicing allows us to access numerous objects at one time. Indexing List In Python Explained [table id=9 /] In the above table, you can see the indexing of a list is very similar to indexing strings. The only difference is that in the list each object holds an index position where in strings each character holds an index position. As always the index always starts at 0 and counts up for each object contained in a list. If we want to access an object going from the end of a list(right to left), we use a negative index number. The last index position when going right to left always starts at -1. Examples Of Indexing List in Python Access Index From Left To Right a = ['List', 12345, [123, 456]] a[1] 12345 a = ['List', 12345, [123, 456]] - We create a list object that contains a string object, number object and another list object. We assign our list object a variable named 'a' to represent the list. a[1] - We call our list object via the variable 'a' then we request the index position of 1. 12345 - We are returned the 1 index positions object which happens to 12345. Access Index From Right To Left a = ['List', 12345, [123, 456]] a[-1] [123, 456] a = ['List', 12345, [123, 456]] - We create a list object and assign the list a variable of 'a'. a[-1] - We then call our list via the variable of 'a' and we then index from the right using a negative index position. Remember when indexing from the right we need to use negative numbers and the starting index position from the right is -1. [123, 456] - We are returned a list that was contained in our list object. The list object is the last object contained in the list and we used -1 to access this list object. Conclusion In this Python tutorial, we looked at accessing list using indexing which is vital in programming when using list. If we can not access our content stored in list then list would be useless. We can pull one object out of a list using indexing if we need to pull more we could index multiple times or we can use slicing which we will cover in the next tutorial. If you have any questions about indexing in Python leave a comment below. In this tutorial we use Python 3.5.0
Views: 13421 Master Code Online
Python Count String Method
 
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Be sure to like, share and comment to show your support for our tutorials. ======================================= Channel - https://goo.gl/pnKLqE Playlist For This Tutorial - https://goo.gl/EyZFti Latest Video - https://goo.gl/atWRkF Facebook - https://www.facebook.com/mastercodeonline/ Twitter - https://twitter.com/mastercodeonlin?lang=en Website - http://mastercode.online ====================================== Python Count String Method In this Python tutorial, we will look at how to use the Python count string method with our Python strings. The count string method enables us to search a string for occurrences. The count string method takes three arguments first one which are required searches a string for depicted occurrence. The other two arguments define a starting point and ending point for the search. The count string method will return the number occurrences an integer. Python Count String Method Syntax 'string'.count('occurrence', index starting point, index stopping point) Occurrence - Must be a string Index Starting Point - This is an optional argument. Default is 0 and must be present if the index stopping point is present. Index Stopping Point - This is an optional argument. Default is the end of the string object. Examples of the Python Count String Method #Example 1: a = 'This is a string' #Example 2: a.count('s') 3 #Example 3: a.count('s', 2, 10) 2 #Example 4: a.count('s', 0, 10) 2 #Example 5: a.count('s', 0) 3 Examples Explained Example 1: a = 'This is a string' - We create a new string object and give it the variable of 'a' to represent the string object. Example 2: a.count('s')- We call our string object via the variable 'a' and call the count string method on our string object and we add an occurrence argument of 's'. So the count string method to search our whole string object for the letter s. 3 - We are returned an integer of 3 indicating that the count string method found three 's' in our string object. Example 3: a.count('s', 2, 10)- We call our string via the variable 'a' and call the count string method on our string object and we add an occurrence argument of 's' again but this time we add a starting point of the number 2 index location and a ending point of the 10 index location. The count string method will start at 2 index spot(third spot in) and end at the 10 index spot(11th spot in from the left). 2 - We are return an integer of 2 which the count string method only found two occurrences in our string object. Example 4: a.count('s', 0, 10)- We call our string via the variable 'a' and call the count string method on our string object. We add an occurrence argument of 's'. This time we add a starting point of '0' to signify the start of the string. If we have an ending point we need to add a starting point so if you want to start at the beginning of the string we need to add '0'. We then add 10 as the ending index. 2 - We are returned an integer value of '2' which indicates that the count string method only found two occurrences in our string object. Example 5: a.count('s', 0) - In this example, we call our string method via our variable 'a' and call the count string method on our string object. We add an occurrence argument of 's'. We only provide a starting point of 0 which is actually the default starting point in the count string method. 3 - We are returned an integer of 3 because the count string method has found three occurrences. Conclusion In this Python tutorial, we saw how the Python count string method works in Python if you have questions leave a comment below.
Views: 13012 Master Code Online
TYPEERROR Convert Datatypes In Python Ex Integer To String Etc
 
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How to convert integers to strings, strings to integers, floats, and other datatypes in python. This will prevent that nasty TypeError about not concatenating strings and integers. Basically you can't add 12 to word.
Views: 16 Everything Awesome
Python Tutorial for Beginners 5: Dictionaries - Working with Key-Value Pairs
 
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In this Python Beginner Tutorial, we will begin learning about dictionaries. Dictionaries allow us to work with key-value pairs in Python. We will go over dictionary methods, how to add and remove values, and also how to loop through the key-value pairs. Let's get started. The code from this video can be found at: https://github.com/CoreyMSchafer/code_snippets/tree/master/Python-Dicts Watch the full Python Beginner Series here: https://www.youtube.com/playlist?list=PL-osiE80TeTskrapNbzXhwoFUiLCjGgY7 ✅ Support My Channel Through Patreon: https://www.patreon.com/coreyms ✅ Become a Channel Member: https://www.youtube.com/channel/UCCezIgC97PvUuR4_gbFUs5g/join ✅ One-Time Contribution Through PayPal: https://goo.gl/649HFY ✅ Cryptocurrency Donations: Bitcoin Wallet - 3MPH8oY2EAgbLVy7RBMinwcBntggi7qeG3 Ethereum Wallet - 0x151649418616068fB46C3598083817101d3bCD33 Litecoin Wallet - MPvEBY5fxGkmPQgocfJbxP6EmTo5UUXMot ✅ Corey's Public Amazon Wishlist http://a.co/inIyro1 ✅ Equipment I Use and Books I Recommend: https://www.amazon.com/shop/coreyschafer ▶️ You Can Find Me On: My Website - http://coreyms.com/ My Second Channel - https://www.youtube.com/c/coreymschafer Facebook - https://www.facebook.com/CoreyMSchafer Twitter - https://twitter.com/CoreyMSchafer Instagram - https://www.instagram.com/coreymschafer/ #Python
Views: 240551 Corey Schafer
Format A String In Python 3
 
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Be sure to like, share and comment to show your support for our tutorials. ======================================= Channel - https://goo.gl/pnKLqE Playlist For This Tutorial - https://goo.gl/EyZFti Latest Video - https://goo.gl/atWRkF Facebook - https://www.facebook.com/mastercodeonline/ Twitter - https://twitter.com/mastercodeonlin?lang=en Website - http://mastercode.online ====================================== Python String Formatting Method In the previous Python tutorial, we looked at the old way to format strings in Python in this tutorial we will explore the new preferred Python string formatting method. The Python string formatting method gives us better control over how we can modify string objects. The old way has some limitations to how string objects can be modified. When formatting a string in Python using the format method we use curly brackets({}) for placeholders versus the old way where we would use the percentage or modulo symbol(%). If you need to use curly brackets in your string itself and you do not want it to be a placeholder then we can utilize two curly brackets to escape the brackets. Python String Formatting Method Syntax 'String Object {placeholder}.format(arguments) 'String Object {placeholder}' - This our string object that will be modified by the format string method. The {placeholder} is where we are able to insert content into the string object to create a new string object that contains the new content. .format(arguments) - The format string method allows us to modify string objects to create a new string object with some inserted content. The arguments are the content that is going to replace the placeholders in the original string object. Examples of The Python String Formatting Method Format String Method - Example 1 #Example 1 'This is a {} in Python'.format('string') 'This is a string in Python' Example 1 Explained 'This is a {} in Python'.format('string') - In this example, we set up a string object that contains a placeholder({}). The placeholder is where we are about place our argument. The format string method allows us to insert the content(argument) into our string object which will return us a new string object. The 'string' is our argument which will replace the curly brackets. 'This is a string in Python' - We are returned a new string object that contains our argument in the same position that our placeholder was in the previous string object. Format String Method - Example 2 'This is our {} in {}'.format('string', 'Python') 'This is our string in Python' Example 2 Explained 'This is our {} in {}'.format('string', 'Python') - In this example, we create a new string object that contains two placeholders which will be replaced by our arguments which are contained in the right side of the format string method. When adding more than two arguments we must separate them with a comma. In this case when we run this line of code Python's format string method will take the first argument and place in the first placeholder position and then the second argument and place it in the second placeholder position. 'This is our string in Python' - We are returned a new string object with the first and second place holders replaced by the first and second arguments. Format String Method - Example 3 'This is our {1} in {0}'.format('Python', 'string') 'This is our string in Python' Example 3 Explained 'This is our {1} in {0}'.format('Python', 'string') - In this example, we create a new string object which is similar to example 2 but notice we place a number 1 in the first place holder and a number 0 in the second placeholder. We also change the order of the arguments in the format string method. When this line is ran Python will look at the number contained in the placeholders which is actually index position of the arguments. It will then locate the argument via the index position and insert it into the new string object. 'This is our string in Python' - As you can see the format string method found the first index position which is our second argument and inserted that in our new string object. Then the format string method found our next argument at the 0 index position. Format String Method - Example 4 'We are learning {language} {version}'.format(language='Python', version='3') 'We are learning Python 3' Example 4 Explained 'We are learning {language} {version}'.format(language='Python', version='3') - We create a string object that contains our placeholders which are now represented by curly brackets and names. These names will be used to match the arguments with your place holders. 'We are learning Python 3' - We are returned a new string object that replaces the placeholders with the appropriate arguments. Format String Method - Example 5 language = ('Python', '3') 'We are learning {0[0]} {0[1]}'.format(language) 'We are learning Python 3' language = ('Python', '3') - We create a tuple that contains two values.
Views: 5766 Master Code Online
How To Format A String The Old Way in Python 3
 
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Learn More Visit our site at http://learnpythontutorial.com/python-string-formatting-the-old-way/ Python String Formatting The Old Way In this Python tutorial we are going to talk about Python string formatting the old way. There are two ways to format a string in Python. The old way of using a modulo which is sometimes referred to the printf style of formatting. We focus on the printf style in this tutorial. Python has mentioned several times over the last several years that they would remove this method of formatting strings. This method is yet to be yanked do to the fact that so many programs still use this method. The preferred method to formatting strings in Python is to the format string method. We will discuss the format string method in the next tutorial. Formatting a string in Python allows us to add content to existing string object which will return us a new string object. We use string formatting often to modify content that will be displayed to a user. For example, we would like to take a username and say 'Hello, Username' we can take a string object and modify the string object to display 'Hello, John Doe' with some simple string formatting. Python String Formatting The Old Way Syntax 'String Object %s' % 'Value' 'String Object %s' - This our string object that will be changed. %s represents the placeholder for a string object value. % - This is our operator. 'Value' - The value is content that will replace the placeholder in a string object. If we are replacing one placeholder it can be in a string format if we are replacing more than one placeholder the value must be contained in a tuple or dictionary. Examples Of Python String Formatting The Old Way #Example 1 'This is a %s' % 'String' 'This is a String' #Example 2 a = 'Hello, %s' userName = 'Johnny' a % userName 'Hello, Johnny' #Example 3 'We are learning %s %s' % ('Python', '3') 'We are learning Python 3' #Example 4 'We are learning %(language)s %(version)s' % {'language' : 'Python', 'version' : '3'} 'We are learning Python 3' Examples Explained Example 1: 'This is a %s' % 'String' - In this example we create a string object with a placeholder that will accept a string. Then we place a value on the right side of the operator. The value will replace the placeholder. Since we only had one value to insert we can keep our value in a string format. We could still use the tuple or dictionary. 'This is a String' - We are returned a new string object that contains our value which replaced the placeholder. Example 2: a = 'Hello, %s' - We create a new string object that contains a placeholder for a string. The we give that string object a variable of 'a'. userName = 'Johnny' - We create a new string object that holds our users name. We then assign the variable named 'userName' to the string object. a % userName - We call our string object via the variable 'a' and then on the right side of operator we add a value via the variable 'userName'. 'Hello, Johnny' - We are returned a new string object that contains our first string object with the placeholder replaced by our value which was represented by 'userName'. Example 3: 'We are learning %s %s' % ('Python', '3') - We create a new string object that contains two place holders for strings. Then on the right side of the operator we create a tuple to hold our two values that we will insert into our new string object. Remember that a tuple or dictionary must be used if there is more than one value to be inserted. 'We are learning Python 3' - We are returned a new string object that contains our new values Example 4: 'We are learning %(language)s %(version)s' % {'language' : 'Python', 'version' : '3'} - We set up a string object that contains two place holders. These two place holders contain the keys from the dictionary. The keys are the values on the left hand side of the colon in a dictionary. The keys must be contained in parentheses and we still provide a type value on the outside of the parentheses. When the keys are called they will insert their values in place of the key. 'We are learning Python 3' - We are returned a new string object that contains the values in our dictionary which were called via their keys. Conclusion In this Python tutorial, we discussed Python string formatting the old way. If you have any questions about formatting Python strings leave a comment below and we will help you.
Views: 1920 Master Code Online
Python TypeError: unsupported operand types for +: 'int' and 'str'
 
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Python TypeError: unsupported operand types for +: 'int' and 'str'
Views: 15572 ATOM
How do I change the data type of a pandas Series?
 
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Have you ever tried to do math with a pandas Series that you thought was numeric, but it turned out that your numbers were stored as strings? In this video, I'll demonstrate two different ways to change the data type of a Series so that you can fix incorrect data types. I'll also show you the easiest way to convert a boolean Series to integers, which is useful for creating dummy/indicator variables for machine learning. SUBSCRIBE to learn data science with Python: https://www.youtube.com/dataschool?sub_confirmation=1 JOIN the "Data School Insiders" community and receive exclusive rewards: https://www.patreon.com/dataschool == RESOURCES == GitHub repository for the series: https://github.com/justmarkham/pandas-videos "astype" documentation: http://pandas.pydata.org/pandas-docs/stable/generated/pandas.Series.astype.html == LET'S CONNECT! == Newsletter: https://www.dataschool.io/subscribe/ Twitter: https://twitter.com/justmarkham Facebook: https://www.facebook.com/DataScienceSchool/ LinkedIn: https://www.linkedin.com/in/justmarkham/
Views: 41385 Data School
Command Line Arguments in Python programming language (sys module, sys.argv[] string list)
 
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In this video we're going to talk about command line arguments in python programming language. In order to use command line arguments you need to import sys module. Command line arguments are kept inside sys.argv[] string list. Also we're going to make an simple example with usage of command line arguments.
Views: 14038 nevsky.programming
Arrays in Python / Numpy
 
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Arrays are collections of strings, numbers, or other objects. This tutorial demonstrates how to create and manipulate arrays in Python with Numpy.
Views: 132615 APMonitor.com
Python 3 Programming Tutorial - Multi-dimensional List
 
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In this Python 3 programming tutorial, we cover the multi-dimensional list. Up until now, we have focused on single dimensional lists, but this is limiting. In programming, we are able to create lists with infinite depth. Here's how! Sample code for this basics series: http://pythonprogramming.net/beginner-python-programming-tutorials/ Python 3 Programming tutorial Playlist: http://www.youtube.com/watch?v=oVp1vrfL_w4&feature=share&list=PLQVvvaa0QuDe8XSftW-RAxdo6OmaeL85M http://seaofbtc.com http://sentdex.com http://hkinsley.com https://twitter.com/sentdex Bitcoin donations: 1GV7srgR4NJx4vrk7avCmmVQQrqmv87ty6
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#4 Python Tutorial for Beginners | Variables in Python
 
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Python Tutorial to learn Python programming with examples Complete Python Tutorial for Beginners Playlist : https://www.youtube.com/watch?v=hEgO047GxaQ&t=0s&index=2&list=PLsyeobzWxl7poL9JTVyndKe62ieoN-MZ3 Python Tutorial in Hindi : https://www.youtube.com/watch?v=JNbup20svwU&list=PLk_Jw3TebqxD7JYo0vnnFvVCEv5hON_ew In this video we will see : - What is variable - Why do we need them - How to assign value to variable - Fetching value of previous operation - String value to variable - Fetching value of string variable by index number - Finding length of string Editing Monitors : https://amzn.to/2RfKWgL https://amzn.to/2Q665JW https://amzn.to/2OUP21a. Editing Laptop : ASUS ROG Strix - (new version) https://amzn.to/2RhumwO Camera : https://amzn.to/2OR56AV lens : https://amzn.to/2JihtQo Mics https://amzn.to/2RlIe9F https://amzn.to/2yDkx5F Check out our website: http://www.telusko.com Follow Telusko on Twitter: https://twitter.com/navinreddy20 Follow on Facebook: Telusko : https://www.facebook.com/teluskolearnings Navin Reddy : https://www.facebook.com/navintelusko Follow Navin Reddy on Instagram: https://www.instagram.com/navinreddy20 Subscribe to our other channel: Navin Reddy : https://www.youtube.com/channel/UCxmkk8bMSOF-UBF43z-pdGQ?sub_confirmation=1 Telusko Hindi : https://www.youtube.com/channel/UCitzw4ROeTVGRRLnCPws-cw?sub_confirmation=1 Donation: PayPal Id : navinreddy20 Patreon : navinreddy20 http://www.telusko.com/contactus
Views: 276363 Telusko
How do I use string methods in pandas?
 
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pandas includes powerful string manipulation capabilities that you can easily apply to any Series of strings. In this video, I'll show you how to access string methods in pandas (along with a few examples), and then end with two bonus tips to help you maximize your efficiency. SUBSCRIBE to learn data science with Python: https://www.youtube.com/dataschool?sub_confirmation=1 JOIN the "Data School Insiders" community and receive exclusive rewards: https://www.patreon.com/dataschool == RESOURCES == GitHub repository for the series: https://github.com/justmarkham/pandas-videos string handling documentation: http://pandas.pydata.org/pandas-docs/stable/api.html#string-handling == LET'S CONNECT! == Newsletter: https://www.dataschool.io/subscribe/ Twitter: https://twitter.com/justmarkham Facebook: https://www.facebook.com/DataScienceSchool/ LinkedIn: https://www.linkedin.com/in/justmarkham/
Views: 29756 Data School
Python Beginner Tutorial 4 - User Input and Types
 
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This tutorial covers getting input from a user by using the Python built int input() function. This video also goes over the difference between variable types, namely integers and strings in Python. After watching this tutorial users should be able to prompt the user for input and parse integers from strings using the int() function. Dedicated Discussion Thread: https://forums.kjdelectronics.com/index.php?/topic/435-python-beginner-tutorial-4-user-input-and-types/ Forum: https://forums.kjdelectronics.com/ Store: https://kjdelectronics.com Instagram: https://www.instagram.com/kjdelectronics/ Twitter: https://twitter.com/kjdElectronics Facebook: https://www.facebook.com/kjdelectronics/
Views: 53334 kjdElectronics
Sorting in Python  ||  Learn Python Programming  (Computer Science)
 
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Sorting is a fundamental task in software engineering. In Python, there are a variety of ways to sort lists, tuples, and other objects. Today we talk about the sort() method which is an in-place algorithm for sorting lists. We also cover the sorted() function which can be used on more objects, and creates a sorted copy, leaving the original object unchanged. We were able to make this Python video with the help of our Patrons on Patreon! We would like to recognize the generosity of our VIP Patrons Matt Peters, Andrew Mengede, Martin Stephens, and Markie Ward. Thank you so much for helping us continue our work! ➢➢➢➢➢➢➢➢➢➢ To​ ​help​ us continue making videos,​ ​you​ ​can​ ​support​ Socratica at: ​Patreon​: https://www.patreon.com/socratica Socratica Paypal: https://www.paypal.me/socratica We also accept Bitcoin! :) Our​ ​address​ ​is: 1EttYyGwJmpy9bLY2UcmEqMJuBfaZ1HdG9 Thank​ ​you!! ➢➢➢➢➢➢➢➢➢➢ If you’d like a reference book, we recommend “Python Cookbook, 3rd Edition” from O’Reilly: http://amzn.to/2sCNYlZ The Mythical Man Month - Essays on Software Engineering & Project Management http://amzn.to/2tYdNeP ➢➢➢➢➢➢➢➢➢➢ You​ ​can​ ​also​ ​follow​ ​Socratica​ ​on: -​ ​Twitter:​ ​@socratica -​ ​Instagram:​ ​@SocraticaStudios -​ ​Facebook:​ ​@SocraticaStudios ➢➢➢➢➢➢➢➢➢➢ Python instructor: Ulka Simone Mohanty (@ulkam on Twitter) Written & Produced by Michael Harrison (@mlh496 on Twitter)
Views: 71867 Socratica
Python Beginner Tutorial 7 - Clean Code and Exceptions
 
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This tutorial covers an introduction to writing clean code. This video focuses on cleaning up our existing calculator program to make it more robust and easier to read. This video also introduces the for loop, loop control keywords "break," "continue" and introduces the "import" keyword to demonstrate time.sleep() and random.randint(). After watching this video you should be ready to start on the two challenges posed at the end of the video. Challenge 1: Random Calculator Modify the calculator program to use randint to run random calculations. Make this as random as you want so be creative!! Feel free to also use time.sleep() to give your program a more autonomous feel to it. Bonus points if you incorporate a for loop and loop control keywords. Remember to use the clean code strategies discussed in this video; if you have big blocks of code that look hard to read then try to fix it. Challenge 2: Rock, Paper, Scissors Game This idea was originally created by Zibzo and what he is posted https://forums.kjdelectronics.com/index.php?/topic/437-rock-paper-scissors-beginners-practice/. Try to write clean code and note that what was posted by Zibzo has room for improvement given what we learned in this video.  Dedicated Discussion Thread: https://forums.kjdelectronics.com/index.php?/topic/441-python-beginner-tutorial-7-clean-code-and-exceptions/ Forum: https://forums.kjdelectronics.com/ Store: https://kjdelectronics.com Instagram: https://www.instagram.com/kjdelectronics/ Twitter: https://twitter.com/kjdElectronics Facebook: https://www.facebook.com/kjdelectronics/
Views: 51842 kjdElectronics
The IP Address Decomposition Problem - Compute All Valid IP Addresses From Raw IP String
 
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Come Visit Us: https://backtobackswe.com Try Interview Cake (sponsored link): https://www.interviewcake.com/?utm_source=backtobackswe Support Us On Patreon: https://www.patreon.com/backtobackswe Question: You are given a raw IP address string without period separators between the digits. Return all valid IP addresses that can be created from the raw IP string where it is your job to place the periods. This is sort of a knowledge question but if you get this in an interview you'd probably get the constraints, otherwise, it is the interviewer's fault for being a bad interviewer since general SWE questions should primarily be about problem solving skills and not domain specific knowledge/facts. Whenever we hear "compute" or "generate" we know that we will have to do some sort of repeated looping or recursion in a backtracking approach. For this problem, we can do either. Approach 1 (iteration) A triple nested set of for loops where in each section we create a part of the IP string, validate that section we just snipped out and then continue on to generate the rest of the IP string Approach 2 (backtracking) The 3 Keys To Backtracking: Our Choice: - We will take snippets of substrings 1-3 characters long Our Constraints: - We cannot have a value greater than 255 or less than 0 in any subsection. - We cannot have a leading 0 in any subsection Our Goal: - Get 4 valid subsections out of the raw string that we started with that will comprise the fully valid IP recomposition We can make progress through the string, slowly decoding it in all ways possible by taking a snippet, validating it, and then continuing on in the generation path. Since we will be using recursion, each recursive call will express all possible ways to arrange a certain subsection of the string that is... Until we reach the base case which is when we have all 4 segments filled out (and by default, our index pointer has progressed to the string's length). Complexities Time: O(1) - Off the bat, we know that we will have a constant time complexity because there are a limited amount of IP addresses (2^32 to be exact) so our time complexity will fall as O(1) ("constant") Space: O(1) - By the same line of reasoning, our space complexity is O(1) ++++++++++++++++++++++++++++++++++++++++++++++++++ HackerRank: https://www.youtube.com/channel/UCOf7UPMHBjAavgD0Qw5q5ww Tuschar Roy: https://www.youtube.com/user/tusharroy2525 GeeksForGeeks: https://www.youtube.com/channel/UC0RhatS1pyxInC00YKjjBqQ Jarvis Johnson: https://www.youtube.com/user/VSympathyV Success In Tech: https://www.youtube.com/channel/UC-vYrOAmtrx9sBzJAf3x_xw ++++++++++++++++++++++++++++++++++++++++++++++++++ This Question Is "Restore IP Addresses" On Leetcode: https://leetcode.com/problems/restore-ip-addresses This is problem 7.10 in the book Elements of Programming Interviews by Adnan Aziz
Views: 1890 Back To Back SWE
Python Data Types - Numbers And Strings | Python Tutorial For Beginners
 
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Python Tutorials For Beginners - This session will cover python core data types - Numbers and Strings in details both theoretically and practical coding exercise. You will understand- 1. How to create variables and assign numbers in python? 2. What are different types of numbers in python? 3. How to do mathematical calculations in python using numbers? 4. How to add, subtract, multiply, divide numbers in python? 5. What are integers and float numbers and difference between them? 6. How to print numbers in python? 7. How to find type of variable in python? 8. How to evaluate mathematical expressions with mixed data types? 9. How to convert data types in python? 10. How to convert integer to float in python? 11. How to convert float to integers in python? 12. What are python modules? 13. How to import python modules? 14. What is math module in python and how to use math module? 15. How to find square root of number in python? 16. How to find raise to power or exponential of number in python? 17. What are Strings in python and how to use strings in python? 18. How to assign string to variable in python? 19. How to print strings in python? 20. How to find substring in string in python? 21. How to replace substring in string in python? 22. What are index positions in strings? 23. How to split a string using delimiter or separator in python? 24. What is slicing in python? 25. How to slice strings in python? 26. How to print string based on index positions using slices in python? 27. How to print strings with character positions? 28. How to find length of string in python? Limeguru Website: https://www.limeguru.com LimeGuru YouTube Channel https://www.youtube.com/limeguru Limeguru Facebook Page https://www.facebook.com/limeguru/ Music credit: https://www.bensound.com/royalty-free-music
Views: 169 LimeGuru
Python : List Index and Slice  (list Part 2 ) {in தமிழ்}
 
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A list is a data structure in Python that is a mutable, or changeable, ordered sequence of elements. Python Core ------------ Video in English https://goo.gl/df7GXL Video in Tamil https://goo.gl/LT4zEw Python Web application ---------------------- Videos in Tamil https://goo.gl/rRjs59 Videos in English https://goo.gl/spkvfv Python NLP ----------- Videos in Tamil https://goo.gl/LL4ija Videos in English https://goo.gl/TsMVfT Artificial intelligence and ML ------------------------------ Videos in Tamil https://goo.gl/VNcxUW Videos in English https://goo.gl/EiUB4P Linked list in Tamil : https://goo.gl/11n2WW Linked list in English : https://goo.gl/GgfkmB YouTube channel link www.youtube.com/atozknowledgevideos Website http://atozknowledge.com/ Technology in Tamil & English
Views: 479 atoz knowledge
Python Tutorial: Python String Basics - Python Basics #10
 
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In this Python Tutorial we talk about Python String Basics visit our website for more info - http://learnpythontutorial.com/python-string-basics-python-tutorial/ If you have any questions about this Python tutorial leave a comment we will help your out. Do not forget to subscribe we post a new Python tutorial daily so you will not want to miss it. Our website has the full Python Tutorial. In today's Python tutorial, we are going to take a gander at an alternate critical information sort that we utilize regularly as a part of Python. We are going to concentrate on an information sort called a string. A string is a succession of information like content or a gathering of bytes. In this tutorial, we are going to just be concentrating on a prologue to the Python string. We will dive deeper into strings in part 4 of this arrangement. What is a String? A string contains a rundown of characters in a particular order(sequence). The characters in a string can be letters, numbers, uncommon characters like images and spaces. Strings have no restriction on to what extent they may be and you might likewise take a string that contains no characters this is known as a "void string". What is the Python String Syntax? The linguistic structure of a string in Python is truly basic. We make a string by encasing characters in quotes which can be single quotes, twofold quotes or triple quotes. Which strategy you utilize is totally up to you. Through out the tutorials I will be utilizing single quotes for the majority of the tutorials aside from when certain circumstances emerge where single quotes are not the best choice. Python String Syntax 'This is a string in Python' "This is a string in Python" '''This is a string in Python''' """This is a string in Python""" We can not begin with single quote and end with a twofold quote. We must begin and end with same kind of quote.
Views: 10787 Master Code Online
Python Lists | a complete tutorial
 
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This video tutorial is on python lists and how to work with them. contents: 0:12-Introduction to list. 1:48-Different methods to create lists. 1:50-Empty List. 2:00-List of strings. 2:10-List of numbers. 2:18-List of numbers using list comprehension (using for loop). 2:44-List of numbers using range. 2:55-Creating a list of even numbers less than 10 using list comprehension. 3:18-Creating a list of even numbers less than 10 using range. 3:36-Creating List from comma separated strings. 4:04-Put all characters in a string to list. 4:30-Put each digit in an integer to list. 4:53-Convert the dictionary key or value to list. 5:49-Built-in functions for lists in python. 5:57-list.append() to append a single element at the end of the list. 7:00-list.extend() to append each element of one list to another list. 7:40-list.insert() used to insert an item at a particular location. 8:25-list.index to fetch the index of an item in the list. 9:08-list.remove method to remove an element from the list. 9:35-list.pop method which removes and returns us the element from the list. 10:23-list.sort to sort the list either in ascending or descending order. 11:00-list.reverse method is used to reverse the list items. 11:27-len method to get the length or number of items in a list. 11:53-min and max functions to find the minimum or maximum value in a list. 12:26-list.count method to find how many time an item appears in the list. 12:58-list.clear method to remove all the elements in the list. 13:20-To check if an item exists in the list. 13:52-indexing the python list. 14:00-fetch the first element. 14:27-get the last item. 15:04-Slicing (fetching specific portion of our list) examples. 15:56-slicing with increment or skipping. 16:45-Slicing in reverse order. 17:25-reversed function to iterate a list in reverse order. 18:28-Slice Assignment to insert or replace items of one list inside another list at a particular location. 19:25-remove elements using slicing assignment. 19:41-how to copy list, understand why copying a list is tricky. 22:40-copy list using deepcopy. 23:16-for loops on lists. 24:05-join all the contents in the list in to a string. 24:55-convert a list of lists in to a flat list. 25:46-see if list has duplicate elements. 26:40-shift or rotate the list Music: Summer, endless motion from www.bensound.com
Views: 11845 Art of Engineer
Lesson 6.4: Logical indexing in MATLAB
 
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A video segment from the upcoming Coursera MOOC on introductory computer programming with MATLAB by Vanderbilt. Lead instructor: Mike Fitzpatrick. Check out the companion website and textbook: http://cs103.net
Views: 22789 Fitzle LLC
Iterate Through Python List Using For Loops
 
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Python 3.7 Version - https://youtu.be/QHPEP2ztiPE Check out Python 3.7 tutorial series at https://www.mastercode.online/courses/python-37-complete-tutorial-series Be sure to like, share and comment to show your support for our tutorials. ======================================= Channel - https://goo.gl/pnKLqE Playlist For This Tutorial - https://goo.gl/EyZFti Latest Video - https://goo.gl/atWRkF Facebook - https://www.facebook.com/mastercodeonline/ Twitter - https://twitter.com/mastercodeonlin?lang=en Website - https://www.mastercode.online ====================================== In this Python instructional exercise, we are going to figure out how to iterate through a Python list. Iterate means looping through a procedure in programming. We will figure out how experience a list and print every item contained in a list in Python. We will utilize a for loop in Python. We quickly took a gander at for loops in the string segment of our instructional exercises. The for loop will experience every article that shows up in a list and print that question or give back that protest one time. On the off chance that we have to give back every item contained in a list of the for loop is our best alternative. We could likewise fulfill this errand by indexing every article, except that would take forever and take a great deal of code. Our objective when programing is to restrain the measure of code composed to perform an assignment. For Loop Syntax for variable in arrangement: print(variable) For Loop Syntax Explained for - Indicates to Python that we need to iterate through or loop through our sequence(list, dictionary(keys), tuples, strings, and so on.) variable - This variable can be anything that meets the Python variable rules. I think about this variable as only a placeholder for every item contained in a list. in - In is an administrator in Python that check for the enrollment. I think about this as is it in that list, word reference, tuple, string, and so on. This implies is it a player in that question. : - Colon demonstrates the begin of a piece of code. We will see a considerable measure of colons later on instructional exercises print() - Print is still some portion of the for loop which is alluded to as a square of code. The print articulation will print every item contained in the arrangement to us. variable - This is the same variable in the for loop line this equitable calls the placeholder variable so Python knows which questions print. Cases Of Iterating in Python Using The For Loop a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] for var in a: ... print(var) ... 1 2 3 4 5 6 7 8 9 10 a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] - We make a list protest that contains the numbers 1 through 10. We allocate the variable of "a" to speak to the list object. for var in a: - We then perform a for loop on our list object. In the first place we incorporate the for which demonstrates we need to iterate through the list object. We then appoint every article contained in the list question a provisional variable which we allude to as var in this case. At that point we utilize the in administrator to advise our project to look in the list item speak to by the variable 'a'. print(var) - Important we have to include two spaces before this line of code. We incorporate our print explanation to show we might want to print every item that is spoken to by the transitory variable of var. Given back our articles - We are given back every one of items contained in our list object. Notice every one is imprinted on another line. Essential Infomation About The For Loop The principal line must have a colon( : ) toward the end. The second line must be indented( two spaces) We can utilize else discretionary statement in a for loop. The interim variable can be anything you need the length of it meets Pythons variable rules. Conclusion In this Python instructional exercise, we figure out how to iterate through a list utilizing the Python for loop. On the off chance that you have any inquiries concerning iterating please leave a remark beneath.
Views: 29705 Master Code Online
Python Tutorial: How To Use The Python Isalnum String Method
 
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For more information about the Python isalnum string method visit our site at http://learnpythontutorial.com/python-isalnum-string-method/ Python Isalnum String Method In this Python tutorial we take a look at the Python isalnum string method in Python. The isalnum string method allow us to check if all the contents of a string are numbers. This string method only works with integers not floating point numbers because floating point numbers contain decimals. If the string object contains all numbers and no other characters we will be returned a boolean of True. If the string object contains anything other than an integer we be returned a boolean of False. Python Isalnum String Method Syntax 'String'.isalnum() 'String' - The string must contain only numbers(integers) for a True return and if the string object contains anything other a number then we will get a False statement. Examples Of The Python Isalnum String Method Example 1: '1243'.isalnum() True Example 2: '4.5'.isalnum() False Example 3: a = '56' a.isalnum() True Example 4: b = ' 98' b.isalnum() False Examples Explained Example 1: '1243'.isalnum() - We create a string object that contains numbers and call the isalnum string method on our string object. True- We are returned the boolean of True which means all characters contained in the string object are numbers. Example 2: '4.5'.isalnum() - We create a string object that contains numbers but this string object also contains a decimal point and then we call the isalnum string method on the string object. False- We are returned False because our string object contains a decimal. Example 3: a = '56'- Here we create a new string object and assign a variable of 'a' to represent our string object. Our string object contains all numbers. a.isalnum()- We call our string object via the variable of 'a' and then we call the isalnum string method on your string object. True- We are returned True because our string object contains all numbers. Example 4: b = ' 98'- In this example, we create a string object that contains a space and some numbers. We chose the variable 'b' to represent the string object. b.isalnum()- We call our string object via the variable of 'b' and then we call the isalnum string method on our object. False - We are returned False because our string object contains a space. Conclusion In this Python tutorial we took a look at the Python isalnum string method. If you have any questions about this string method leave a comment below.
Views: 2121 Master Code Online
string list split elements in python
 
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Code in Python to split elements of a string list. Like and share. It's FREE too :) Download source code at: https://drive.google.com/file/d/1my3zVxpes4-HUZ3SSx5aEWPAxsp2m_uf/ Follow us on Facebook https://www.facebook.com/AllTech-1089946481026048/
Views: 344 AllTech
Python Programming Tutorial | Introduction | GeeksforGeeks
 
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Find Complete Code at GeeksforGeeks Article: http://www.geeksforgeeks.org/python-language-introduction/ This video is contributed by Parikshit Kumar Pruthi Please Like, Comment and Share the Video among your friends. Also, Subscribe if you haven't already! :)
Views: 49145 GeeksforGeeks
Python Programming #7 - Tuples
 
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Python Programming for Beginners! A series of Python Tutorials covering all the basics of Python programming. In this video we'll cover everything about Tuples, how to create them, add and delete items in them, and various functions revolving around lists. ► JOIN THECODEX TODAY! https://www.thecodex.me/ ► THE COMPLETE PYTHON PROGRAMMING BOOTCAMP: https://www.thecodex.me/python-bootcamp ► FACEBOOK: https://www.facebook.com/TheCodex1/ ► TWITTER: https://twitter.com/thecodexme ► SUPPORT ME ON PATREON: https://www.patreon.com/The_Codex ♦♦♦♦♦♦♦♦♦♦ THECODEX is a company focused on empowering and enabling anyone to learn how to code. Established in 2015 by Avinash Jain, THECODEX has taught over 150,000 students around the world how to code. With over 13 programming courses on a wide variety of topics, and more than 10,000 5-Star reviews, THECODEX is the right choice for you. We provide engaging and comprehensive videos that break down complex information and cover everything you need to know about the subject. All students get access to our Q/A forums where you can get your doubts and problems cleared up. At the end of every course, you will receive a certificate of completion. Jumpstart your Coding Journey with THECODEX today! ♦♦♦♦♦♦♦♦♦♦ Music: Flash Funk (Marshmello)
Views: 5796 TheCodex
Largest number in a list in python
 
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Program Explanation 1. User must enter the number of elements and store it in a variable. 2. User must then enter the elements of the list one by one using a for loop and store it in a list. 3. The list should then be sorted. 4. Then the last element of the list is printed which is also the largest element of the list. To watch all Python programs, Visit my channel 👇 https://www.youtube.com/channel/UCkktsFQAPJz8PkMr15gAhXw Or www.youtube.com/channel/Pratik Matkar
Views: 2858 Pratik Matkar
Python: Accumulative Swing Index (ASI) 1 Mathematics and Stock Indicators
 
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This video teaches you what the Accumulative Swing Index / Swing Index is. Developed by Welles Wilder, the ASI is mostly used with futures. The purpose of this series is to teach mathematics within python. To do this, we will be working with a bunch of the more popular stock indicators used with technical analysis. With most of the indicators, we will first discuss them, their purpose, then teach how to program them into python, then actually display them on a chart. The basic charting application comes from a previous tutorial series, here: http://www.youtube.com/playlist?list=PLQVvvaa0QuDcR-u9O8LyLR7URiKuW-XZq Required files: Sample Code for the actual charting parts: http://sentdex.com/startingPoint.py Python: http://python.org Numpy: http://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy Matplotlib: http://matplotlib.org/downloads.html Sentdex.com Facebook.com/sentdex Twitter.com/sentdex
Views: 4275 sentdex
Codecademy - Python: Tutorial #1
 
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★☆★ ENROLL IN CLEVER PROGRAMMER http://cleverprogrammer.to/enroll Unit 1: PYTHON SYNTAX ====================================== 0:00 -- 1. Welcome! 2:15 -- 2. Variables 2:53 -- 3. Booleans 3:39 -- 4. You've Been Reassigned! 3:53 -- 5. Whitespace 4:42 -- 6. Whitespace Means Right Space 4:53 -- 7. Matter of Interpretation 5:36 -- 8. Single Line Comments 6:55 -- 9. Multi-Line Comments 7:20 -- 10. Math 8:58 -- 11. Exponentiation 9:50 -- 12. Modulo 11:52 -- 13. Bringing it All Together Lesson 2: Tip Calculator 14:55 -- 1. The Meal 16:06 -- 2. The Tax 16:35 -- 3. The Tip 19:19 -- 4. Reassign in a Single Line 20:37 -- 5. The Total ====================================== Unit 2: STRINGS AND CONSOLE OUTPUT ====================================== LESSON 1: Strings & Console Output 22:05 -- 1. Strings 23:02 -- 2. Practice 23:30 -- 3. Escaping Characters 25:02 -- 4. Access by Index 28:05 -- 5. String methods 32:42 -- 6. lower() 33:33 -- 7. upper() 33:53 -- 8. str() 35:23 -- 9. Dot Notation 37:17 -- 10. Printing Strings 37:47 -- 11. Printing Variables 38:12 -- 12. String Concatenation ====================================== This is part 1 of the Codecademy Python Walkthrough Tutorial. It covers topics like variables, whitespace, comments, math operations, modulo, string formatting, indexing, functions, methods, and string concatenation. ★☆★ LIVE 1-ON-1 CODING SESSION: ★☆★ https://goo.gl/rXohFR ★☆★ FREE Lesson 1: The Most Important Thing For a Successful Programmer★☆★ https://goo.gl/LwgTHk ★☆★ ENROLL IN CLEVER PROGRAMMER: ★☆★ http://cleverprogrammer.to/enroll Enroll in my Codecademy Helper Course at http://cleverprogrammer.to/enroll with bonus exercises and resources. Python Beginner Book Recommendation: http://amzn.to/2cDhHlZ I have used this book to learn almost all my basics in computer science and this book happens to use the Python programming language which is simply an added bonus due to the simplicity of the Python programming language! ======================= ABOUT PYTHON CODECADEMY SERIES ================= This is meant to guide you through the codecademy python part and it also to help you get a much better understanding of the code that you to write according to the instructions on CodeCademy.com. This will help you understand many programming concepts and the concepts that are tricky, I open up an interactive prompt and I will also ask you questions along the way to keep it more interactive for you. I believe teaching only works when you actively engage. The target audience is beginners or developers looking to pick up Python. I also emphasize the importance of writing good code and I go through the first part really fast. I will literally be going through every single thing and breaking it down for you so there is nothing for you that would be scary. You can watch me do it and you can simply follow along you will learn ALL the basics. I swear I wish something like this was out there when I started learning because everyone else explains things in such a complicated way and makes it so boring! I honestly think programming is based upon exploration and creativity rather than some mathematical/logical genius frame of mind! I spent a lot of hard work in making this so I hope you guys enjoy and learn something out of it while having fun! This is targeted towards beginners, for developers looking to learn python, or for individuals looking for a refresher on basics in computer programming!! ============================= CHANNEL INFO ============================ Clever Programmer Instagram: https://www.instagram.com/clever_prog... Website: http://www.CleverProgrammer.com This Video: https://youtu.be/2dmBp5RydwE ... Github (Code) ► http://cleverprogrammer.to/github
Views: 170230 Clever Programmer
Python Tutorial: pip - An in-depth look at the package management system
 
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In this video, we will take an in-depth look at Python's package management system, pip. We'll walk through how to install, uninstall, list, and upgrade packages. We will also dive into how we can output our dependencies and install a list of dependencies. An in-depth knowledge of pip can be a great addition to your Python tool-belt. ✅ Support My Channel Through Patreon: https://www.patreon.com/coreyms ✅ Become a Channel Member: https://www.youtube.com/channel/UCCezIgC97PvUuR4_gbFUs5g/join ✅ One-Time Contribution Through PayPal: https://goo.gl/649HFY ✅ Cryptocurrency Donations: Bitcoin Wallet - 3MPH8oY2EAgbLVy7RBMinwcBntggi7qeG3 Ethereum Wallet - 0x151649418616068fB46C3598083817101d3bCD33 Litecoin Wallet - MPvEBY5fxGkmPQgocfJbxP6EmTo5UUXMot ✅ Corey's Public Amazon Wishlist http://a.co/inIyro1 ✅ Equipment I Use and Books I Recommend: https://www.amazon.com/shop/coreyschafer ▶️ You Can Find Me On: My Website - http://coreyms.com/ My Second Channel - https://www.youtube.com/c/coreymschafer Facebook - https://www.facebook.com/CoreyMSchafer Twitter - https://twitter.com/CoreyMSchafer Instagram - https://www.instagram.com/coreymschafer/ #Python
Views: 75253 Corey Schafer
Creating and initialising a fixed size Python list
 
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In this tutorial I look at how to create and initialise a fixed size Python list. Whilst pointing out that you should not really regard a list as fixed in size (just because the arrays of other languages are fixed in size). A Python list is similar to arrays of other languages but they are not the same. For example a list can store mixed types in its elements and a list can grow and shrink its length as expressed by the number of its elements.
Views: 650 John Philip Jones
Python - Features
 
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Python - Features Watch More Videos at: https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Malhar Lathkar, Tutorials Point India Private Limited
Minimum jump to reach end
 
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Given an array, find minimum number to jumps to reach end of array, given you can jump at max as much as value at position in array. https://github.com/mission-peace/interview/blob/master/src/com/interview/dynamic/MinJumpToReachEnd.java https://github.com/mission-peace/interview/wiki
4Python - String Formatting Operators
 
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Python - String Formatting Operators Watch More Videos at: https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Malhar Lathkar, Tutorials Point India Private Limited
Coding 101 21: Perl: Getting Started
 
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Hosts: Fr. Robert Ballecer, SJ and Shannon Morse Guest: Patrick Delahanty Ivory Tower Control Structures * The structure of Perl is more like C# than Python -- While Python uses whitespace to delineate lines of code, Perl uses ";" a semicolon -- Also like C#, Perl uses "{}" Curly brackets to create BLOCKS of code Variables * Much like Python, Perl doesn't require you to declare variables seperately from expressions. * You can declare variable WITHIN the expression. Perl offers three types of variables: Scalars, Arays and Associative Arrays * We're going to show you the first two: Scalars and Arrays Printing in Perl * Printing in Perl works much in the same way as printing in Python * You can print numbers, strings, variables, and combinations thereof. Scalars * These are either numbers or strings * Perl doesn't require you to mark a variable as either a number or a string... it all looks the same to Perl * Perl also doesn't require you to differerentiate between integers and real numbers Usage of Scalars: * You declare a scalar variable by using "$" right befofe the name of the variable $Var1 = 28 Creates a variable named "Var1" containing the integer "4" $Var2 = "Coding 101" Crates a variable named "Var2" containing the string "Coding 101" $Var3 = 3.14 Creates a variable named "Var3" containing the decimal number "4.5" Arrays * An array is a ONE-DIMENSIONAL indexed list of Scalar variables Usage of Arrays * You declare an array by using "@" right before the name of the array * Individual scalar variables within the array can be accessed by pointing to their index with the SCALAR identifier @C101 = ("Padre", "Snubs", "Bryan") Creates an array named "C101" and fills it with the strings, "Padre", "Snubs" and "Bryan" @coding = @c101 Creates an array called, "coding" and fills it with the values from the array "c101" $C101[2] = "Cranky Hippo" Changes the value in the third item in the array "C101" from "Bryan" to "Cranky Hippo" Get in Touch With Us! * Subscribe and get Coding 101 automatically at TWiT.tv! * Follow PadreSJ and Snubs on Twitter. * Watch the show live and join the chatroom every Thursday at 1:30pm PST. * Email us at [email protected] and [email protected] * Join our Google+ Community! Bandwidth for Coding 101 is provided by Cachefly. Running time: 42:03
Views: 48217 Coding 101
Python: Accumulative Swing Index (ASI) 3 Mathematics and Stock Indicators
 
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This video continues the tutorial showing you how to program the ASI into python using sample gold futures data. The purpose of this series is to teach mathematics within python. To do this, we will be working with a bunch of the more popular stock indicators used with technical analysis. With most of the indicators, we will first discuss them, their purpose, then teach how to program them into python, then actually display them on a chart. The basic charting application comes from a previous tutorial series, here: http://www.youtube.com/playlist?list=PLQVvvaa0QuDcR-u9O8LyLR7URiKuW-XZq Required files: Sample Code for the actual charting parts: http://sentdex.com/startingPoint.py Python: http://python.org Numpy: http://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy Matplotlib: http://matplotlib.org/downloads.html Sentdex.com Facebook.com/sentdex Twitter.com/sentdex
Views: 1652 sentdex
08 String Functions in python
 
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This videos explains about the mainly used functions with the strings. count() index() startswith() endswith() islower() isupper() upper() lower() center() There are many more functions as well.. such as: 1 capitalize() Capitalizes first letter of string 2 center(width, fillchar) Returns a space-padded string with the original string centered to a total of width columns. 3 count(str, beg= 0,end=len(string)) Counts how many times str occurs in string or in a substring of string if starting index beg and ending index end are given. 4 decode(encoding='UTF-8',errors='strict') Decodes the string using the codec registered for encoding. encoding defaults to the default string encoding. 5 encode(encoding='UTF-8',errors='strict') Returns encoded string version of string; on error, default is to raise a ValueError unless errors is given with 'ignore' or 'replace'. 6 endswith(suffix, beg=0, end=len(string)) Determines if string or a substring of string (if starting index beg and ending index end are given) ends with suffix; returns true if so and false otherwise. 7 expandtabs(tabsize=8) Expands tabs in string to multiple spaces; defaults to 8 spaces per tab if tabsize not provided. 8 find(str, beg=0 end=len(string)) Determine if str occurs in string or in a substring of string if starting index beg and ending index end are given returns index if found and -1 otherwise. 9 index(str, beg=0, end=len(string)) Same as find(), but raises an exception if str not found. 10 isalnum() Returns true if string has at least 1 character and all characters are alphanumeric and false otherwise. 11 isalpha() Returns true if string has at least 1 character and all characters are alphabetic and false otherwise. 12 isdigit() Returns true if string contains only digits and false otherwise. 13 islower() Returns true if string has at least 1 cased character and all cased characters are in lowercase and false otherwise. 14 isnumeric() Returns true if a unicode string contains only numeric characters and false otherwise. 15 isspace() Returns true if string contains only whitespace characters and false otherwise. 16 istitle() Returns true if string is properly "titlecased" and false otherwise. 17 isupper() Returns true if string has at least one cased character and all cased characters are in uppercase and false otherwise. 18 join(seq) Merges (concatenates) the string representations of elements in sequence seq into a string, with separator string. 19 len(string) Returns the length of the string 20 ljust(width[, fillchar]) Returns a space-padded string with the original string left-justified to a total of width columns. 21 lower() Converts all uppercase letters in string to lowercase. 22 lstrip() Removes all leading whitespace in string. 23 maketrans() Returns a translation table to be used in translate function. 24 max(str) Returns the max alphabetical character from the string str. 25 min(str) Returns the min alphabetical character from the string str. 26 replace(old, new [, max]) Replaces all occurrences of old in string with new or at most max occurrences if max given. 27 rfind(str, beg=0,end=len(string)) Same as find(), but search backwards in string. 28 rindex( str, beg=0, end=len(string)) Same as index(), but search backwards in string. 29 rjust(width,[, fillchar]) Returns a space-padded string with the original string right-justified to a total of width columns. 30 rstrip() Removes all trailing whitespace of string. 31 split(str="", num=string.count(str)) Splits string according to delimiter str (space if not provided) and returns list of substrings; split into at most num substrings if given. 32 splitlines( num=string.count('\n')) Splits string at all (or num) NEWLINEs and returns a list of each line with NEWLINEs removed. 33 startswith(str, beg=0,end=len(string)) Determines if string or a substring of string (if starting index beg and ending index end are given) starts with substring str; returns true if so and false otherwise. 34 strip([chars]) Performs both lstrip() and rstrip() on string. 35 swapcase() Inverts case for all letters in string. 36 title() Returns "titlecased" version of string, that is, all words begin with uppercase and the rest are lowercase. 37 translate(table, deletechars="") Translates string according to translation table str(256 chars), removing those in the del string. 38 upper() Converts lowercase letters in string to uppercase. 39 zfill (width) Returns original string leftpadded with zeros to a total of width characters; intended for numbers, zfill() retains any sign given (less one zero). 40 isdecimal() Returns true if a unicode string contains only decimal characters and false otherwise. .... Learn Python after C by Learn Everyday (Tushar Sibal) Python tutorials for beginners
Views: 71 Learn Everyday
Find the missing number in the increasing sequence
 
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Given an increasing sequence of numbers from 1 to n with only one missing number, how can you find that missing number without traversing the sequence in linear fashion. In other words, time complexity of your algorithm must be less than O(n)? For example, if the given sequence is 1,2,4,5,6,7,8 then the missing number is 3. If the given sequence is 1,3,4,5 then the missing number is 2. For the input 2,3,4,5 output returned should be 1 as it is the missing number. If we traverse the given sequence number by number starting from the element at the 0th index, we can easily tell which number is missing by looking at the difference between the number at index 'i' and number at index 'i-1'. If this difference is greater than 1, we know that we have identified a missing number. For example, for sequence {1,2,3,4,6,7,8}, difference between number 6 and number 4 is 2 and hence we say that missing number is 5. BUT, as per the problem statement we are not supposed to traverse the sequence in linear fashion. Let's look at an optimized approach which runs in log(n) time. Correctly placed numbers: For a number 'i', if all the 'i-1' numbers appearing before it are present in the given sequence then we say that the number 'i' is correctly placed in the given sequence. Because the given sequence is stored in an array which starts from index 0, we can easily check if a number is correctly placed by checking if its index is equal to the value of that number minus 1. For example, for sequence {1,2,3,4,6,7,8}, if you consider number 4 which is correctly placed, its index is 3 which is 4 minus 1. Same is the case for numbers 1,2 and 3. But for numbers 6,7 and 8 which are not correctly placed(since number 5 which appears before them is missing), their respective indices are not equal to their respective values minus 1. Idea: Now using the above idea of correctly placed numbers, to find out the missing number we find the first number from the left in the given sequence(say number 'j') which is incorrectly placed. Once we find this number 'j', we know that the missing number must be 'j-1' since number 'j' is the first element from the left which is incorrectly placed in the given sequence. Algorithm: We find this above defined number 'j' using binary search algorithm. If 'array' stores the given sequence and if function 'findMissingElement(int[] array, int low, int high)' is used to find the missing number in this 'array' with its first element at index 'low' and its last element at index 'high', then the steps used by this function are as following - 1. If low greater than high, then this is invalid input case. To indicate that, return -1. 2. If low == high, then we have found the first element which is incorrectly placed. Return 'array[high] - 1' in this case. Step #1 and step #2 are base cases for this binary search. Recursive steps are as following. 3. Calculate mid as (low + high)/2. a. If array[mid] is correctly placed, then we need to search for the first incorrectly placed element in the higher half of the array(from 'mid + 1' to high). Note that since array[mid] is correctly placed it cannot be the first incorrectly placed element and therefore we exclude it from the search by making low = mid + 1. b. If array[mid] is incorrectly placed, then we need to search for the first incorrectly placed element in the lower half of the array(from low to mid). Note that since array[mid] could also be the first element which is incorrectly placed, we cannot exclude it from the search and hence we make high = mid(and not 'mid - 1'). c. With the modified array boundary in above steps, we make recursive call findMissingElement(array, low, high) to find the missing number. Code and Algorithm Visualization: http://www.ideserve.co.in/learn/find-the-missing-number-in-the-increasing-sequence Website: http://www.ideserve.co.in Facebook: https://www.facebook.com/IDeserve.co.in
Views: 8425 IDeserve
Python - Convert lists to strings and back again. ( split / join)
 
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Practice here - http://www.pythontutor.com/live.html#mode=edit
python TypeError: 'dict_keys' object does not support indexing
 
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python TypeError: 'dict_keys' object does not support indexing
Views: 1408 ATOM
Python Beginner Tutorial 1 - Install and Setup PyCharm IDE
 
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This tutorial covers the instillation of the latest version of Python 3 and instillation and setup of the Free JetBrains PyCharm IDE. After watching this video you will know how to run your very first python script (Hello World). This video series is ideal for individuals looking to learn their first programming language or individuals looking to learn python as another programming language. Download Links: Python3: https://www.python.org/downloads/ PyCharm (Community): https://www.jetbrains.com/pycharm/download/#section=windows Dedicated Discussion Thread: https://forums.kjdelectronics.com/index.php?/topic/431-python-beginner-tutorial-1-install-and-setup-pycharm-ide/ Forum: https://forums.kjdelectronics.com/ Store: https://kjdelectronics.com Instagram: https://www.instagram.com/kjdelectronics/ Twitter: https://twitter.com/kjdElectronics Facebook: https://www.facebook.com/kjdelectronics/
Views: 243113 kjdElectronics
Python Programming |Python Programming For Beginners|Python Programming List/String Concept Tutorial
 
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This video tutorial is on python lists and how to work with them. This Python programming tutorial take you through the important concepts in Python that includes Python variables, number, what are strings in Python, input() method, what are lists in Python, python loops, while loop, nested loops, functions, arrays and also create hangman game using hand-on simple Python programming. upcoming Python videos we will cover OOPS language so you can create classes and objects. We'll look into situations where one needs to create classes and object. This tutorial will also train you in writing basic and intermediate level programs. We'll also look at dictionaries and a basic scenario to use them. Now, let us get started and learn python basics. you can find Github link below---- https://github.com/harry1180/python_basics You will find all documents for python programming in my Github account contents: Introduction to list. Different methods to create lists. Empty List. List of strings. List of numbers. List of numbers using list comprehension (using for loop). List of numbers using range. Creating a list of even numbers less than 10 using list comprehension. Creating a list of even numbers less than 10 using range. Creating List from comma separated strings. Put all characters in a string to list. Put each digit in an integer to list Built-in functions for lists in python. list.append() to append a single element at the end of the list. list.extend() to append each element of one list to another list. -list.insert() used to insert an item at a particular location. list.index to fetch the index of an item in the list. list.remove method to remove an element from the list. list.pop method which removes and returns us the an element from the list. list.sort to sort the list either in ascending or descending order. list.reverse method is used to reverse the list items. len method to get the length or number of items in a list. list.count method to find how many time an item appears in the list. list.clear method to remove all the elements in the list.
Views: 36 Placement Talk
Python Tutorial for Beginners 2: Strings - Working with Textual Data
 
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In this Python Beginner Tutorial, we will begin learning about the string data type. Strings allow us to work with textual data in Python. We will be going over different ways to format strings, and also a lot of useful string methods. Let's get started. The code from this video can be found at: https://github.com/CoreyMSchafer/code_snippets/tree/master/Python-Strings Watch the full Python Beginner Series here: https://www.youtube.com/playlist?list=PL-osiE80TeTskrapNbzXhwoFUiLCjGgY7 Slicing Video: https://youtu.be/ajrtAuDg3yw String Formatting Video: https://youtu.be/vTX3IwquFkc ✅ Support My Channel Through Patreon: https://www.patreon.com/coreyms ✅ Become a Channel Member: https://www.youtube.com/channel/UCCezIgC97PvUuR4_gbFUs5g/join ✅ One-Time Contribution Through PayPal: https://goo.gl/649HFY ✅ Cryptocurrency Donations: Bitcoin Wallet - 3MPH8oY2EAgbLVy7RBMinwcBntggi7qeG3 Ethereum Wallet - 0x151649418616068fB46C3598083817101d3bCD33 Litecoin Wallet - MPvEBY5fxGkmPQgocfJbxP6EmTo5UUXMot ✅ Corey's Public Amazon Wishlist http://a.co/inIyro1 ✅ Equipment I Use and Books I Recommend: https://www.amazon.com/shop/coreyschafer ▶️ You Can Find Me On: My Website - http://coreyms.com/ My Second Channel - https://www.youtube.com/c/coreymschafer Facebook - https://www.facebook.com/CoreyMSchafer Twitter - https://twitter.com/CoreyMSchafer Instagram - https://www.instagram.com/coreymschafer/ #Python
Views: 294324 Corey Schafer
Python Tutorials for Beginners - Learn Python Online
 
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Watch my BRAND NEW Python tutorial with projects: https://youtu.be/_uQrJ0TkZlc Looking for Python tutorials for beginners? Watch this video to learn Python online. 🔥Subscribe for more Python tutorials for beginners: https://goo.gl/6PYaGF 🔥Get my COMPLETE Python course with a BIG discount: https://goo.gl/AVb6Uq - Python Exercises for Beginners: https://goo.gl/1XnQB1 - Python 3 Cheat Sheet: https://goo.gl/Jeu29b Want to learn more from me? Check out my blog and courses: http://programmingwithmosh.com https://www.facebook.com/programmingwithmosh/ https://twitter.com/moshhamedani These days everybody is learning Python 3 because it’s the most popular programming language. If you’re looking for a Python course that teaches you the fundamentals of Python, you’ve come to the right place. This video shows you Python applications as well as python salaries. If you’re looking for a programming job to make more money, Python is the best programming language to learn first. TABLE OF CONTENT 00:00:00 What is Python? 00:03:22 Installing Python 00:05:15 Python Interpreter 00:07:12 Code Editors 00:08:32 Your First Python Program 00:12:11 Python Extensions 00:15:04 Linting Python Code 00:19:20 Formatting Python Code 00:23:16 Running Python Code 00:26:17 Quiz 00:28:41 Variables 00:31:48 Variable Names 00:34:52 Strings 00:40:24 Escape Sequences 00:43:06 Formatted Strings 00:45:16 String Methods 00:51:13 Numbers 00:54:01 Working with Numbers 00:56:12 Type Conversion 01:01:18 Quiz 01:04:03 Comparison Operators 01:06:09 Conditional Statements 01:10:20 Ternary Operator 01:12:31 Logical Operators 01:16:35 Short-circuit Evaluation 01:18:44 Chaining Comparison Operators 01:20:08 Quiz 01:21:53 For Loops 01:25:32 For..Else 01:28:21 Nested Loops 01:31:07 Iterables 01:34:17 While Loops 01:39:18 Infinite Loops 01:40:57 Exercise 01:43:04 Defining Functions 01:45:30 Arguments 01:47:53 Types of Functions 01:51:57 Keyword Arguments 01:53:59 Default Arguments 01:55:36 *args 01:59:53 **args 02:02:15 Scope 02:07:26 Debugging 02:14:18 VSCode Coding Tricks (Windows) 02:16:41 VSCode Coding Tricks (Mac) 02:18:32 Exercise 02:20:03 Solution
Views: 412726 Programming with Mosh

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