if-expr-with-false-true (SIM211)

Derived from the flake8-simplify linter.

Fix is always available.

What it does

Checks for if expressions that can be replaced by negating a given condition.

Why is this bad?

if expressions that evaluate to False for a truthy condition and True for a falsey condition can be replaced with not operators, which are more concise and readable.

Example

False if a else True

Use instead:

not a

References

• Python documentation: Truth Value Testing