pydoc doesn't have public API other than its CLI and the help() function. I'd cleanup or even rewrite pydoc before declare anything public in it. On the other hand, there are already functions related to splitdoc() in the inspect module: https://docs.python.org/3/library/inspect.html#retrieving-source-code See also issue 18956.

There is no rush to make splitdoc() public. We can improve pydoc in 3.5 and 3.6 timeline and then decide what's should be part of the public API.