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pydoc fails on custom instances in specific cases. (When instance __name__ does not resolve to a str).
This is a small example:
>>> import pydoc
>>> class A:
... def __getattr__(self, name):
... return True
... 
>>> print(pydoc.render_doc(A))
Python Library Documentation: class A in module __main__
(...)
>>> print(pydoc.render_doc(A()))
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "./Lib/pydoc.py", line 1534, in render_doc
 if name and '.' in name:
TypeError: argument of type 'bool' is not iterable

Patch upload, second attempt.

New changeset 2a35dfbe3d99 by R David Murray in branch '3.2':
#14638: pydoc now treats non-str __name__ as None instead of raising
http://hg.python.org/cpython/rev/2a35dfbe3d99
New changeset 86b4b54bb0fa by R David Murray in branch 'default':
merge #14638: pydoc now treats non-str __name__ as None instead of raising
http://hg.python.org/cpython/rev/86b4b54bb0fa
New changeset 501651b93cb0 by R David Murray in branch '2.7':
#14638: pydoc now treats non-str __name__ as None instead of raising
http://hg.python.org/cpython/rev/501651b93cb0 

Thanks Peter.