[Python-Dev] Py3k: Except clause syntax (original) (raw)

Georg Brandl g.brandl at gmx.net
Fri Mar 17 22:21:26 CET 2006

Brett Cannon wrote:

On 3/17/06, Georg Brandl <g.brandl at gmx.net> wrote:

John J Lee wrote:

>> In your formulation the comma binds more tightly than the as keyword. >> In import statements it's the other way around. That seems like it >> might be a source of confusion. > > Perhaps parentheses around the exception list should be mandatory for the > 2-or-more exceptions case? > > except NameError as e: --> fine > except (NameError) as e: --> fine > except (NameError,) as e: --> fine > > except NameError, OtherError as e: --> SyntaxError > except (NameError, OtherError) as e: --> fine I don't like that particularly, but I guess that for consistency's sake it would have to be done this way. I don't like it period. What consistency problem is there? This is Python 3 we are talking about, so if something makes good sense such as not having parentheses, I say leave them off. There are multiple places where parens could be required but are not, like multiple assignment.

I only think of consistency with the usage of "as" in the import statement. I know how it works, but I predict people will come and write

except NameError as e, OtherError as f:

Georg

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