Like grep, but only searches through docstrings (in Python code).
From pip:
$ pip install --upgrade docgrep
$ docgrep 'Python 3.4' .
./asyncio/futures.py:113: """This class is *almost* compatible with concurrent.futures.Future.
Differences:
- result() and exception() do not take a timeout argument and
raise an exception when the future isn't done yet.
- Callbacks registered with add_done_callback() are always called
via the event loop's call_soon_threadsafe().
- This class is not compatible with the wait() and as_completed()
methods in the concurrent.futures package.
(In Python 3.4 or later we may be able to unify the implementations.)
"""