Intermediate Python Puzzle #1: List Comprehensions - Powerful Syntax for Building Lists in Python

Published: 05 January 2021
on channel: Kris Jordan

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Python's List Comprehensions are a beautiful syntactical concept that help you to build lists from iterables (ranges, other lists, anything you can use in a for/in loop, generally) very succinctly. Filter and transform items in the resulting list with ease. This tutorial introduces list comprehensions in a puzzle problem that gives you the opportunity to think through some examples before revealing how it works.

0:00 - Introduction
0:20 - Python List Comprehension Example Puzzle
1:32 - Rewriting a for in loop to a list comprehension in Python
3:54 - Using a conditional in a list comprehension to filter items from the input
6:29 - Tracing through a list comprehension example with a conditional filter and transformation
8:25 - Make list comprehensions easier to read by using simple expressions
10:14 - Practice list comprehension problems to trace through
11:40 - List comprehensions with string values and method call expressions

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