YouTube is a great way of learning Python. But those channels top all others. In this article, you’ll find a list of the top YouTube Channels — in reverse order! Corey Schäfer #6 Channel link: https://www.youtube.com/user/schafer5/ 37,444,096 channel views Channel Description: This channel is focused on creating tutorials and walkthroughs for software developers, programmers, and … Read more
Want to create your own webserver in a single line of Python code? No problem, just use this command in your shell: The terminal will tell you: To shut down your webserver, kill the Python program with CTRL+c. This works if you’ve Python 3 installed on your system. To check your version, use the command … Read more
Python’s Tilde ~n operator is the bitwise negation operator: it takes the number n as binary number and “flips” all bits 0 to 1 and 1 to 0 to obtain the complement binary number. For example, the tilde operation ~1 becomes 0 and ~0 becomes 1 and ~101 becomes 010. Read all about the Tilde … Read more
Yes, the dot regex matches whitespace characters when using Python’s re module. Consider the following example: Try it yourself in our interactive Python shell (click “run”): The dot matches all characters in the string–including whitespaces. You can see that there are many whitespace characters ‘ ‘ among the matched characters. Need more info? Watch the … Read more
To add an element to a given Python list, you can use either of the three following methods: Use the list insert method list.insert(index, element). Use slice assignment lst[index:index] = [element] to overwrite the empty slice with a list of one element. Use list concatenation with slicing lst[:2] + [‘Alice’] + lst[2:] to create a … Read more
You’ve probably landed on this article because you’re working on a code project with textual data that has some leading or trailing whitespaces. There’s only one question you want to be answered: How to get rid of those whitespaces? So without wasting any more of your time, let’s get to the core! How to Trim … Read more
List comprehension is a compact way of creating lists. The simple formula is [expression + context]. Expression: What to do with each list element? Context: What elements to select? The context consists of an arbitrary number of for and if statements. The example [x for x in range(3)] creates the list [0, 1, 2]. Being … Read more
I just got invited to perform Google’s FooBar challenge. In this article, I want to share with you how I solved the problems in real-time. The purpose of this article is to educate you—and to have some fun. So, are you ready? Level 1: Prime Numbers The first goal was to find an identifier for … Read more
Creating animations in matplotlib is reasonably straightforward. However, it can be tricky when starting, and there is no consensus for the best way to create them. In this article, I show you a few methods you can use to make amazing animations in matplotlib. Matplotlib Animation Example The hardest thing about creating animations in matplotlib … Read more
Short answer: To find the minimal list in a list of lists, you need to make two lists comparable. How? With the key argument of the min() function. The key argument is a function that takes one input (a list) and returns one output (a numerical value). The list with the smallest numerical value is … Read more
How to check if a Python string s1 contains another string s2? There are two easy ways to check whether string s1 contains string s2: You can try both methods in our interactive Python shell (just click “Run” to execute the code in your browser): Puzzle: Can you modify “Method 2” so that it also … Read more
Short answer: To find the maximal list in a list of lists, you need to make two lists comparable. How? With the key argument of the max() function. The key argument is a function that takes one input (a list) and returns one output (a numerical value). The list with the largest numerical value is … Read more