lru-cache-without-parameters (UP011)

Derived from the pyupgrade linter.

Fix is always available.

What it does

Checks for unnecessary parentheses on functools.lru_cache decorators.

Why is this bad?

Since Python 3.8, functools.lru_cache can be used as a decorator without trailing parentheses, as long as no arguments are passed to it.

Example

import functools


@functools.lru_cache()
def foo(): ...

Use instead:

import functools


@functools.lru_cache
def foo(): ...

Options

• target-version

References

• Python documentation: @functools.lru_cache
• Let lru_cache be used as a decorator with no arguments