useless-try-except (TRY203)

Added in 0.7.0 · Related issues · View source

Derived from the tryceratops linter.

What it does

Checks for immediate uses of raise within exception handlers.

Why is this bad?

Capturing an exception, only to immediately reraise it, has no effect. Instead, remove the error-handling code and let the exception propagate upwards without the unnecessary try-except block.

Example

def foo():
    try:
        bar()
    except NotImplementedError:
        raise

Use instead:

def foo():
    bar()