Huh? func_defaults, default values in function calls

[Fredrik Lundh]

Roger Baklund <roger at netconnect.no> wrote:
> I don't get it. Why isn't the dictionary reset to {'x':'a'} when i call
> the function the last time?
>
> >>> a.func_defaults
> ('', '', {'x': 'a', 'y': 'c'})
>
> Why is not {} the default for the z parameter?

read the fine manual:

    http://www.python.org/doc/current/ref/function.html

    Default parameter values are evaluated when the function
    definition is executed. This means that the expression is
    evaluated once, when the function is defined, and that
    that same "pre-computed" value is used for each call.

(reading the entire page might help you understand why this
is by design, not by accident)

</F>