The ‘_’.join(list) method on the underscore string ‘_’ glues together all strings in the list using the underscore string as a delimiter—and returns a new string. For example, the expression ‘_’.join([‘a’, ‘b’, ‘c’]) returns the new string ‘a_b_c’. Definition and Usage The string.join(iterable) method joins the string elements in the iterable to a new string … Read more
Short answer: To flatten your list of list lst, use the nested list comprehension [x for l in lst for x in l] to iterate over all nested lists (for l in lst) and over all their elements (for x in l). Each element x, you just place in the outer list, unchanged. When browsing … Read more
Freelancing is the new way to organize the world’s talents. The appearance of big freelancing platforms made it possible to exchange talent efficiently—across borders, currencies, and niches. You can watch the following video as you go through the article: Freelance Developer Course Link This article is for you if: You’re a freelance developer and you’re … Read more
In this article, we will completely ignore the coding technicalities and syntax for a change. We’ll focus on time and work management, which represents a significant portion of a skillset of well-rounded and successful companies and individuals. Disclaimer: A clear distinction between project and product management might be blurred in some organizations, and could be … Read more
Do you want to convert a Python set to a list? Use the list(…) constructor and pass the set object as an argument. For example, to convert a set of strings friends into a list, use the code expression list(friends). Here’s an example code snippet that converts the set to a list using the list(…) … Read more
Do you have a list but you want to convert it to a Python set? No problem! Use the set(…) constructor and pass the list object as an argument. For example, if you have a list of strings friends, you can convert it to a set using the call set(friends). Here’s an example code snippet: … Read more
In this tutorial, you’ll learn the runtime complexity of different Python operations. Then, you’ll learn how to calculate the complexity of your own function by combining the complexity classes of its constituents. This is called “static analysis” The tutorial is loosely based on (source) but it extends it significantly with more practical examples, interactive snippets, … Read more
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
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
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