In this tutorial, I’ll show you the difference of the regular expression quantifiers in Python. What’s the difference between the question mark quantifier (?), the plus quantifier (+), and the asterisk quantifier (*)? Say, you have regular expression pattern A. Regex A? matches zero or one occurrences of A. Regex A* matches zero or more … Read more
This tutorial shows you everything you need to know to help you master the essential reverse() method of the most fundamental container data type in the Python programming language. Definition and Usage: The list.reverse() reverses the order of the elements in the list. If you want to create a new list with reversed elements, use … Read more
This tutorial shows you everything you need to know to help you master the essential pop() method of the most fundamental container data type in the Python programming language. Definition and Usage: The list.pop() method removes and returns the last element from an existing list. The list.pop(index) method with the optional argument index removes and … Read more
Surprisingly, even advanced Python coders don’t know the details of the copy() method of Python lists. Time to change that! Definition and Usage: The list.copy() method copies all list elements into a new list. The new list is the return value of the method. It’s a shallow copy—you copy only the object references to the … Read more
Surprisingly, even advanced Python coders don’t know about the clear() method of Python lists. Time to change that! Definition and Usage: The list.clear() method removes all elements from an existing list. The list becomes empty again. Here’s a short example: In the first line, you create the list lst consisting of five integers. You then … Read more
This tutorial shows you everything you need to know to help you master the essential remove() method of the most fundamental container data type in the Python programming language. Definition and Usage: The list.remove(element) method removes the first occurrence of the element from an existing list. It does not, however, remove all occurrences of the … Read more
You’ve plotted some data in Matplotlib but you don’t know which data shows what? It’s time for a legend! How to add a legend in Python’s Matplotlib library? Label it with the label keyword argument in your plot method. Before plt.show(), call plt.legend() your plot will be displayed with a legend. Here’s the minimal example: … Read more
How can you insert an element at a given index in a given list? Python’s insert() method is your friend. This tutorial shows you everything you need to know to help you master an essential method of the most fundamental container data type in the Python programming language. Definition and Usage: The list.insert(i, element) method … Read more
How can you not one but multiple elements to a given list? Use the extend() method in Python. This tutorial shows you everything you need to know to help you master an essential method of the most fundamental container data type in the Python programming language. Definition and Usage The list.extend(iter) method adds all elements … Read more
… Without Working Full-Time Hours! In this article, you are going to learn my exact strategy how to earn $3000 per month as a Python freelancer without actually working full-time and without sacrificing time with your family! This article is based on the following webinar I gave to my community of Python coders. You … Read more
Python is one of the most popular coding languages out there. Although it may not take long for you to learn the basics, it takes a lot of time and effort to become an expert. The best way to get there? Practice, practice, practice! In this article, we’ve put together 13 of the best Python … Read more
So you have two or more lists and you want to glue them together. This is called list concatenation. How can you do that? These are six ways of concatenating lists: List concatenation operator + List append() method List extend() method Asterisk operator * Itertools.chain() List comprehension Output: What’s the best way to concatenate two … Read more