[Interface-dev] twisted developer writing zope component system tutorial

[Jonathan Simms]

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Hi everyone, I'm a twisted developer and I'm writing a tutorial on
both how and why one uses a component system, and more specifically
how twisted's integration with zope.interface works and the best
practices for using it.

I've been trying to think of a good example for explaining a
general-case situation where zope.interface.classProvides is useful.
The example of having an IFooFactory doesn't seem like it would come
up all that often. Then again, perhaps that's either just my
inexperience or something inherent in the nature of using
classProvides. Why would describing the interface that an "instance
factory" be useful in terms of adaptation? or is that not the point?

Any suggestions?

Thanks,
Jonathan Simms
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