Source introspection needs to be smarter in python 3.2

[fperez]

Because of this:

http://docs.python.org/py3k/whatsnew/3.2.html#pep-3147-pyc-repository-directories

the x?? will likely not work correctly in python3.2. The suggested fix there is to use the new imp module, so we probably need to update our introspection machinery to use those utilities in python3.2.

[takluyver]

As far as I can see, this is working fine - our oinspect machinery calls functions in the standard inspect module, which does the right thing. Even code that uses __file__ should be fine, as Python 3 sets that to the source file, not the cached file (ref). The only exception I can see would be if our code uses __file__ and assumes it will always get a .pyc file.

I'm closing this, but feel free to reopen it if you can find any problems.

[fperez]

No prob, thanks for looking into it!