named-expr-without-context (PLW0131)

Derived from the Pylint linter.

What it does

Checks for uses of named expressions (e.g., a := 42) that can be replaced by regular assignment statements (e.g., a = 42).

Why is this bad?

While a top-level named expression is syntactically and semantically valid, it's less clear than a regular assignment statement. Named expressions are intended to be used in comprehensions and generator expressions, where assignment statements are not allowed.

Example

(a := 42)

Use instead:

a = 42