10 Python One-Liners That Will Make Your Code More Efficient

Introduction

Python’s simplicity and readability make it a popular choice among developers. However, many programmers aren’t aware of the language’s capacity for powerful one-liners that can replace multiple lines of code. This article delves into ten such one-liners, explaining their functionality and demonstrating how they can streamline your code.

The One-Liners

1. List Comprehension for Filtering

even_numbers = [x for x in range(10) if x % 2 == 0]

List comprehensions offer a concise way to create lists based on existing lists or iterables. This one-liner filters even numbers from 0 to 9.

2. Dictionary Comprehension

square_dict = {x: x**2 for x in range(5)}

Similar to list comprehensions, dictionary comprehensions allow for the creation of dictionaries in a single line. This example creates a dictionary of numbers and their squares.

3. Conditional Expression (Ternary Operator)

num = 3
result = “Even” if num % 2 == 0 else “Odd”