[capi-sig] Code for a Python function

[Campbell Barton]

Hi Enrico,
Officially, I think what you want to do isn't really supported by python.
- What if the python function is loaded from a pyc with no source code?
- What if the function is defined in a string which is executed but
does not correspond to a valid __file__ you can open and inspect.

In practice you can probably manage it if make a few assumptions.

You can access these attributes (or their C values directly):
 myfunc.__code__.co_filename
 myfunc.__code__.co_firstlineno

Personally I'd not worry about the PyCodeObject changing (though
without more details on what you do its hard to say).

Or you could import the 'inspect' module via the C api and call its
getsource() function, however 'inspect' just makes a guess too and
isn't guaranteed to give the correct result, this at least gets around
changes in PyCodeObject but assumes a full python installation.