unnecessary-comprehension / R1721

Message emitted:

Unnecessary use of a comprehension, use %s instead.

Description:

Instead of using an identity comprehension, consider using the list, dict or set constructor. It is faster and simpler.

Problematic code:

NUMBERS = [1, 1, 2, 2, 3, 3]

UNIQUE_NUMBERS = {number for number in NUMBERS}  # [unnecessary-comprehension]

Correct code:

NUMBERS = [1, 1, 2, 2, 3, 3]

UNIQUE_NUMBERS = set(NUMBERS)

Created by the refactoring checker.