From: Mark Sparshatt <msparshatt@...>
Date: 2004-04-24T05:00:39+09:00
Subject: Re: StringIO

Hal Fulton wrote:

> I've been playing with StringIO, and I've found that it doesn't inherit
> from IO.
>
> I had thought this would be natural, as it would in theory permit us to
> use a StringIO wherever an IO is used.
>
Well as long as the code doesn't check the class of it's parameters and 
just relies on duck typing it should still be possible to use a StringIO 
in place of an IO object.


However, IIRC there are parts of the core language that do explicitly 
check that they're receiving a string, for speed reasons, so having 
StringIO inherit from String makes more sense.

--
Mark Sparshatt