Possible constant assignment operators ":=" and "::=" for Python

[Fredrik Lundh]

Christophe wrote:

> I think you've made a mistake in your example.

     >>> constant A = []
     >>> def foo(var):
     ...     var.append('1')
     ...     print var
     ...
     >>> b = A
     >>> foo(b)
     >>> foo(b)

> > and this ?
> >
> >     >>> constant A = []
> >     >>> print A is A
>
> Obviously, False.

why obviously ? why shouldn't a constant be constant ?

</F>