Nick Coghlan <ncogh...@gmail.com> added the comment:

Fixing this has uncovered another issue: the old import emulation in PEP 302 
ignored encoding cookies, thus merrily decoding everything as utf-8 in 
"get_source()". importlib is smarter about this, which means the pydoc tests 
started failing as they tried to load the files with invalid encoding cookies.

I plan to tackle this in two parts:

- move get_source() and get_code() in importlib towards consistently raising 
ImportError, regardless of the reason the result couldn't be provided (chaining 
the exceptions to ensure details aren't lost)

- update pydoc to tolerate ImportError from get_source.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue15343>
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