if-expr-with-twisted-arms (SIM212)

Derived from the flake8-simplify linter.

Fix is always available.

What it does

Checks for if expressions that check against a negated condition.

Why is this bad?

if expressions that check against a negated condition are more difficult to read than if expressions that check against the condition directly.

Example

b if not a else a

Use instead:

a if a else b

References

• Python documentation: Truth Value Testing