Simplifying Lists with List Comprehensions

List Comprehensions allow you to create lists using for loops and conditional statements in a single line of code.

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[expression for item in iterable]

List comprehensions are written inside square brackets ([]) with an expression, a for loop, and optionally an if condition.

This allows you to generate new lists based on existing iterables like lists or tuples.

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numbers = [1, 2, 3, 4, 5]
squared = [num ** 2 for num in numbers]

print("squared:", squared)
# [1, 4, 9, 16, 25]

List comprehensions are used to apply operations to each item of an existing list to generate a new list, or to create a new list including only items that meet specific conditions.

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numbers = [1, 2, 3, 4, 5]
# Include only even numbers
even_numbers = [num for num in numbers if num % 2 == 0]

print(even_numbers)
# [2, 4]