On Jun 3, 12:59 pm, George Sakkis <[EMAIL PROTECTED]> wrote:
> On Jun 3, 6:11 pm, [EMAIL PROTECTED] wrote:
>
>
>
> > Hello all,
>
> > I have come across this issue in Python and I cannot quite understand
> > what is going on.
>
> > class Param():
> > def __init__(self, data={}, condition=False):
> > if condition:
> > data['class']="Advanced"
> > print data
>
> > In the previous example, I expect the variable data to be re-
> > initialized every time I construct an object type Param. However, when
> > I do the following:
>
> > Param(condition=True)
> > Param(condition=False)
>
> > The second call still prints {'class': 'Advanced'}
>
> > Shouldn't data be initialized to {} since it is the default in
> > __init__? Why would the state of data be preserved between two
> > independent instantiations?
>
> > Any help would be greatly appreciated.
>
> > M.
>
> This must be by far the most FAQ.. unfortunately it seems it will
> remain for 3.x as
> well:http://www.python.org/doc/faq/general/#why-are-default-values-shared-...
Thanks for clearing this up for me.
M.
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