I can't remember ever taking advantage of the fact
that mutable default arguments are shared accross function invocations.

Can you remember taking advantage of the fact Python is logical, consistent, and elegant? I tend to think its lack of syntactic sugar and exceptions set it apart. Although there are sometimes things that could bite you, there's a lot of value in having those things be perfectly predictable, like having default argument values evaluated once, when the function declaration is evaluated. To do it any other way would introduce an unnecessary "except when" into the explanation of Python.

Shane Green

805-452-9666 | shane@umbrellacode.com

On Jan 2, 2013, at 3:08 AM, alex23 <wuwei23@gmail.com> wrote:

On Jan 2, 5:29 pm, Antoine Pitrou <solip...@pitrou.net> wrote:
Let's call them a compromise then, but calling them a language feature
sounds delusional. I can't remember ever taking advantage of the fact
that mutable default arguments are shared accross function invocations.

I'd say it's slightly more delusional to believe that if _you_ haven't
used a language feature, that it's not a "feature".
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