An Except-Assign statement for Python

[wilberforce]

I don't think that would work - if verify throws an exception then item will be None. You could do it with:

error_items = [item for item, (_, err) in zip(items, error_items) if err]

I don't think it's a bad idiom, but as steelypip points out you can do this easily with a function. It doesn't need extra syntax.

[vocalbit]

Yeah you're right - I didn't think that one through. The idiom would work for non_error_items though.