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

[Serhiy Storchaka]

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')

?
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