misplaced-bare-raise / E0704

Message emitted:

The raise statement is not inside an except clause

Description:

Used when a bare raise is not used inside an except clause. This generates an error, since there are no active exceptions to be reraised. An exception to this rule is represented by a bare raise inside a finally clause, which might work, as long as an exception is raised inside the try block, but it is nevertheless a code smell that must not be relied upon.

Problematic code:

def validate_positive(x):
    if x <= 0:
        raise  # [misplaced-bare-raise]

Correct code:

def validate_positive(x):
    if x <= 0:
        raise ValueError(f"{x} is not positive")

Created by the exceptions checker.