Adaptation and typecasting (was Re: [Python-Dev] replacing 'global')

Phillip J. Eby pje at
Tue Oct 28 08:57:54 EST 2003

At 09:56 AM 10/28/03 +0100, Alex Martelli wrote:
>AND, adaptation is not typecasting:
>e.g y=adapt("23", int) should NOT succeed.

Obviously, it wouldn't succeed today, since int doesn't have __adapt__ and 
str doesn't have __conform__.  But why would you intend that they not have 
them in future?

And, why do you consider adaptation *not* to be typecasting?  I always 
think of it as "give me X, rendered as a Y", which certainly sounds like a 
description of typecasting to me.

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