List Comprehensions for Fast Transformations

Core idea

List comprehensions keep short transformations readable when the operation is simple and the intent is obvious.

Revision points

• Use them for mapping and filtering.
• Avoid nesting too deeply.
• Prefer explicit loops when the logic becomes hard to scan.

scores = [42, 75, 91, 63]
passed = [score for score in scores if score >= 70]
print(passed)

What to remember

Readable Python wins over clever Python.