no-else-raise / R1720

Message emitted:

Unnecessary "%s" after "raise", %s

Description:

Used in order to highlight an unnecessary block of code following an if, or a try/except containing a raise statement. As such, it will warn when it encounters an else following a chain of ifs, all of them containing a raise statement.

Problematic code:

def integer_sum(a: int, b: int) -> int:
    if not (isinstance(a, int) and isinstance(b, int)):  # [no-else-raise]
        raise ValueError("Function supports only integer parameters.")
    else:
        return a + b

Correct code:

def integer_sum(a: int, b: int) -> int:
    if not (isinstance(a, int) and isinstance(b, int)):
        raise ValueError("Function supports only integer parameters.")
    return a + b

Created by the refactoring checker.