[Python-ideas] except expression

[Chris Angelico]

On Thu, Feb 20, 2014 at 11:15 AM, Ethan Furman <ethan at stoneleaf.us> wrote:
> which would be converted to (using Nick's notation):
>
> result = 1/x except ZeroDivisionError -> NaN
>
> result = some_func(value1, value2) except SomeError -> 42

These two I strongly support (colon or arrow, either way).

> os.unlink(some_file) except OSError -> None

This one, not so much. You're using os.unlink(some_file) as a
statement, ignoring its return value. Changing its return value to
None in the case of an exception isn't exactly what you're trying to
do. Yes, it does make for a one-liner, where the full form takes two:

try: os.unlink(some_file)
except OSError: pass

but I'm not sure that it's the right way to do things.

ChrisA