[Python-ideas] except expression

[Steven D'Aprano]

On Wed, Feb 19, 2014 at 05:34:26PM -0800, Andrew Barnert wrote:

> So, while there's no need to actually ban "os.unlink(some_file) except 
> OSError: None", it doesn't make a good argument for the PEP.

What he said.

It's actually a bad argument for the PEP, as it's a misuse of the 
expression form. A slightly less-worse example might be:

errors = filter(bool, [os.unlink(file) except OSError as err: 
                       err.args[0] for file in files])

except we're deferring the "as err" part :-)


-- 
Steven