falsy-dict-get-fallback (RUF056)

Fix is sometimes available.

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

What it does

Checks for dict.get(key, falsy_value) calls in boolean test positions.

Why is this bad?

The default fallback None is already falsy.

Example

if dict.get(key, False):
    ...

Use instead:

if dict.get(key):
    ...

Fix safety

This rule's fix is marked as safe, unless the dict.get() call contains comments between arguments that will be deleted.

Fix availability

This rule's fix is unavailable in cases where invalid arguments are provided to dict.get. As shown in the documentation, dict.get takes two positional-only arguments, so invalid cases are identified by the presence of more than two arguments or any keyword arguments.