Hi
In this line, it uses pymode_doc_key:
However, python-mode has change the variable name pymode_doc_key to pymode_doc_bind in version 0.7.8b (https://github.com/python-mode/python-mode/blob/b848f6294ca5858fd17eaf14783fa2042e8142b7/Changelog.rst#L81).
Would you it be ok, if I do a PR to update the variable?