This is test.py:

def foo():
    print "Bla"

And in an interactive session:

>>> import inspect, test
>>> test.foo()
Bla
>>> inspect.getsource(test.foo)
'def foo():\n    print "Bla"\n'

Now I edit test.py to (without exiting the interactive
session):

def foo():
    print "Oh no!"

>>> reload(test)
<module 'test' from 'test.py'>
>>> test.foo()
Oh no!
>>> inspect.getsource(test.foo)
'def foo():\n    print "Bla"\n'

inspect should output the new source.

Logged In: YES 
user_id=1188172

This is the fault of the linecache module which inspect
uses. It caches the file contents and does not reload it
accordingly. However, I assume it's pretty hard finding a
good solution to this.

I'm attaching a patch. Is there some hidden problem that it may cause ?
By the way, this issue is a duplicate of http://bugs.python.org/issue993580

Fix was committed to py3k but with no tests AFAIK. Here's a (failing)
test for trunk that runs OK after Guilherme's patch.

We might want to keep this behavior restricted for when the module was
reloaded.

Er, no, it wasn't committed to py3k, it was just me getting my patches
mixed. Attaching the py3k test with relative import fixed.