[Python-ideas] Re: `raise as` to raise with current exception as cause

07.02.20 16:28, Ram Rachum пише:

The idea is to add `raise as` syntax, that raises an exception while setting the currently caught exception to be the cause. It'll look like this:

try:         1/0     except ZeroDivisionError:         raise as ValueError('Whatever')

What it does is a shorter version of this:

try:         1/0     except ZeroDivisionError as error:         raise ValueError('Whatever') from error

How does it differ from

try: 1/0 except ZeroDivisionError: raise ValueError('Whatever')

?