docstring-extraneous-returns (DOC202)

Derived from the pydoclint linter.

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

What it does

Checks for function docstrings with unnecessary "Returns" sections.

Why is this bad?

A function without an explicit return statement should not have a "Returns" section in its docstring.

This rule is not enforced for abstract methods. It is also ignored for "stub functions": functions where the body only consists of pass, ..., raise NotImplementedError, or similar.

Example

def say_hello(n: int) -> None:
    """Says hello to the user.

    Args:
        n: Number of times to say hello.

    Returns:
        Doesn't return anything.
    """
    for _ in range(n):
        print("Hello!")

Use instead:

def say_hello(n: int) -> None:
    """Says hello to the user.

    Args:
        n: Number of times to say hello.
    """
    for _ in range(n):
        print("Hello!")