[Python-ideas] Enums

[Bruce Leban]

On Thu, Jul 28, 2011 at 10:41 AM, Guido van Rossum <guido at python.org> wrote:

>
> Nice, but it still hides the definitions from static analyzers.
>
> It seems I am almost unique in my insistence that Python's dynamic
> features be used very sparingly. :-)


Having worked recently on a project that made extensive use of dynamics, I
am on your side. In that project, I found it completely impossible to trace
a path between any two points in the program short of stepping through it
with a debugger. There are classes and functions that are never explicitly
referenced anywhere that are found via reflection and then instantiated and
called and it is a nightmare.

On the other hand, I love dynamic features for writing tests.

On Thu, Jul 28, 2011 at 10:12 AM, Barry Warsaw <barry at python.org> wrote:

>
> Ezio had a very nice suggestion, which I've implemented in my experimental
> branch, e.g.:
>
>    >>> foo = sys.modules['foo']
>    >>> Colors.inject(foo)
>
> .inject() takes anything that implements the setattr() protocol.  So that
> you
> could then do:
>
>    >>> import foo
>    >>> foo.red
>    Colors.red


So in this example, how would I figure out where foo.red is set? I can't do
it by looking at the source unless I know about Colors.inject.

And what happens if my Weather class has a value Snow and then someone adds
that to the Colors enum and clobbers Weather.Snow. I didn't change my class
but suddenly I can't make it Snow.

--- Bruce
Follow me: http://www.twitter.com/Vroo http://www.vroospeak.com
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