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reimplemented-operator (FURB118)#

Derived from the refurb linter.

Fix is sometimes available.

This rule is unstable and in preview. The --preview flag is required for use.

What it does#

Checks for lambda expressions and function definitions that can be replaced with a function from the operator module.

Why is this bad?#

The operator module provides functions that implement the same functionality as the corresponding operators. For example, operator.add is equivalent to lambda x, y: x + y. Using the functions from the operator module is more concise and communicates the intent of the code more clearly.


import functools

nums = [1, 2, 3]
total = functools.reduce(lambda x, y: x + y, nums)

Use instead:

import functools
import operator

nums = [1, 2, 3]
total = functools.reduce(operator.add, nums)