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Thu Jan 26 19:54:03 CET 2006 · https://mail.python.org/pipermail/python-dev/2006-January/060124.html

M.-A. Lemburg wrote:
> Please note that inheritance from string will cause the C type
> checks of the form PyString_Check(obj) to return true.
> C code will then assume that it has an object which is
> compatible to string C API which instances aren't.

Oh, sure they are. Types inheriting from str have the same
layout as str, and C code assuming that layout will work fine
with them. Inheritance works (saying "inheritance *just* works
would deny the many fine details that have been engineered to
actually make it work").

Regards,
Martin

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[Python-Dev] Path inherits from string