[Python-ideas] fixing mutable default argument values
Jim Jewett
jimjjewett at gmail.com
Thu May 3 00:00:10 CEST 2007
On 5/2/07, Joel Bender <jjb5 at cornell.edu> wrote:
> @local(history = [])
> def foo(x):
> foo.history.append(x)
This assumes that the name "foo" won't be rebound underneath you.
That is usually, but not always, true. __this_function__ from PEP
3130 would solve that gotcha.
> I like this because it keeps history out of the parameter list, and
> while it's not part of the local namespace, it's readily accessible.
Those are good things.
-jJ
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