Does Python support interfaces?

[Aahz Maruch]

In article <MPG.13dd4ec32cbe48e98982a at news.onlynews.com>,
Randall Parker  <rgparker at west.net> wrote:
>
>I'm quite new to Python. For those who are familiar with Java interfaces: 
>Does Python have a similar facility? 
>
>Can one declare interfaces, then declare that a class implements some 
>interface, instantiate an object of that class type, and then cast it to 
>an interface that it is declared to support and then pass it around as a 
>reference to that interface type and make calls to methods of that 
>interface type?

Let me expand on Justin's post:

Interfaces are *everything* in Python; you use inheritance only when you
want to borrow behavior from an existing class.  If I create a base
class called MyFileType and implemented all the standard methods and
attributes, Python would literally not notice that I was using a brand
new class as a file object.  All the standard Python operations would
just work.  No casting, no subclassing.
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