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useless-contextlib-suppress (B022)

Added in v0.0.118 · Related issues · View source

Derived from the flake8-bugbear linter.

What it does

Checks for contextlib.suppress without arguments.

Why is this bad?

contextlib.suppress is a context manager that suppresses exceptions. It takes, as arguments, the exceptions to suppress within the enclosed block. If no exceptions are specified, then the context manager won't suppress any exceptions, and is thus redundant.

Consider adding exceptions to the contextlib.suppress call, or removing the context manager entirely.

Example

import contextlib

with contextlib.suppress():
    foo()

Use instead:

import contextlib

with contextlib.suppress(Exception):
    foo()

References