[issue11674] list(obj), tuple(obj) swallow TypeError (in _PyObject_LengthHint)

[Elvis Pranskevichus]

Elvis Pranskevichus <elprans at gmail.com> added the comment:

I think that explicitly raising TypeError in __len__() is wrong in any case.  I would argue something like NotImplementedError is a better choice to signal the absence of length.  Which also makes me think that Python's exceptions are, maybe, too coarse sometimes.

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versions: +Python 2.5, Python 2.6, Python 2.7, Python 3.1, Python 3.2

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