consider-using-set-comprehension / R1718#

Message emitted:

Consider using a set comprehension

Description:

Although there is nothing syntactically wrong with this code, it is hard to read and can be simplified to a set comprehension. Also it is faster since you don't need to create another transient list

Correct code:

NUMBERS = [1, 2, 2, 3, 4, 4]

UNIQUE_EVEN_NUMBERS = {number for number in NUMBERS if number % 2 == 0}

Problematic code:

NUMBERS = [1, 2, 2, 3, 4, 4]

UNIQUE_EVEN_NUMBERS = set([number for number in NUMBERS if number % 2 == 0])  # [consider-using-set-comprehension]

Created by the refactoring checker.