Problem: How to perform one-line if conditional assignments in Python? Example: Say, you start with the following code. You want to set the value of x to 42 if boo is True, and do nothing otherwise. Let’s dive into the different ways to accomplish this in Python. We start with an overview: Exercise: Run the … Read more
Do you want to one-linerize the append() method in Python? I feel you—writing short and concise one-liners can be an addiction! 🙂 This article will teach you all the ways to append one or more elements to a list in a single line of Python code! Python List Append Let’s quickly recap the append method … Read more
This article answers a number of questions how to accomplish different things with a Python array in one line. By studying these questions, you’ll become a better coder. So, let’s roll up your sleeves and get started! 🙂 Python One Line Print Array If you just want to know the best way to print an … Read more
Many Python coders—even at intermediate skill levels—are often puzzled when it comes to the asterisk character in Python. What does it mean? How does it work? What’s it purpose? This article answers all of those questions and more. After studying this article, you will have a solid understanding of the asterisk operator * in Python—and … Read more
Python has several built-in data structures such as Lists, Sets and Dictionaries (check out the articles!).In this article, you’ll learn everything you need to know about tuples including real world examples. A Python tuple is an immutable, ordered, and iterable container data structure that can hold arbitrary and heterogeneous immutable data elements. Tuple Motivating Example … Read more
Summary: To write a nested for loop in a single line of Python code, use the one-liner code [print(x, y) for x in iter1 for y in iter2] that iterates over all values x in the first iterable and all values y in the second iterable. Problem: How to write a nested for loop as … Read more
Two ways of writing a recursive one-liner: (1) write the function with return statement in a single line such as in def f(x): return f(x+1), or (2) assign a lambda function to a variable name and use the variable name in the return expression of the lambda function such as in f = lambda x: … Read more
Python is powerful — you can condense many algorithms into a single line of Python code. So the natural question arises: can you write a while loop in a single line of code? This article explores this mission-critical question in all detail. How to Write a While Loop in a Single Line of Python Code? … Read more
Problem: Given a collection. You want to create a new list based on all values in this collection. The code should run in a single line of code. How do you accomplish this? Do you need a lambda function? Example: Given an array a = [1, 2, 3, 4]. You need to create a second … Read more
This tutorial will teach you how to write one-line for loops in Python using the popular expert feature of list comprehension. After you’ve learned the basics of list comprehension, you’ll learn how to restrict list comprehensions so that you can write custom filters quickly and effectively. Are you ready? Let’s roll up your sleeves and … Read more
Do you want to learn Python but you’re overwhelmed and you don’t know where to start? Learn with Python cheat sheets! They compress the most important information in an easy-to-digest 1-page format. Here’s the new Python cheat sheet I just created—my goal was to make it the world’s most concise Python cheat sheet!
You may know the ternary operator x if c else y in Python which reads as “return x if c else return y“. But you may not know that you can also write the ternary operator in a shorter form as (y, x)[c]. Let’s dive into this concise way of hacking your own ternary operator! … Read more