[Python-ideas] except expression

[MRAB]

On 2014-02-18 20:55, Chris Angelico wrote:
> On Wed, Feb 19, 2014 at 3:06 AM, Chris Angelico <rosuav at gmail.com> wrote:
>> I'm currently working on finding a bunch of examples from the stdlib
>> that could be translated. Will post them once I get the script sorted
>> out. As it's currently 3AM, though, that means I need to fry up some
>> bacon or something before I continue :)
>
> Alright, results are in.
>
> Script:
> https://github.com/Rosuav/ExceptExpr/blob/master/find_except_expr.py
> Output:
> https://github.com/Rosuav/ExceptExpr/blob/master/candidates.txt
> Annotated examples:
> https://github.com/Rosuav/ExceptExpr/blob/master/examples.py
>
> The last one is the most readable. I've collected up a bunch of viable
> candidates for translation. (Note that I'm not advocating going
> through and editing these files for no other reason. That'd just be
> code churn. But these are cases where, had this feature existed when
> that code was written, it could have been taken advantage of.)
>
At least one of the examples doesn't need this proposed addition.

"getattr" can accept a default, so:

     func = getattr(self, 'do_' + cmd) except AttributeError: self.default

can be written as:

     func = getattr(self, 'do_' + cmd, self.default)

[snip]