pip install hypothesis[pandas] says hypothesis3.82.1 does not provide the extra 'pandas'
fixed my problem with 

pip install hypothesis[all]

and also realizing that hypothesis.extra tab completion only showed django, and that pandas and numpy extras seem to need to be imported explicitly.
When I ran pip install hypothesis[pandas] I got the following:
Collecting hypothesis[pandas]
  Using cached https://files.pythonhosted.org/packages/36/58/222aafec5064d12c2b6123c69e512933b1e82a55ce49015371089d216f89/hypothesis-3.82.1-py3-none-any.whl
  hypothesis 3.82.1 does not provide the extra 'pandas'

pip install hypothesis[django] seemed to work and hypothesis.extra has django but not pandas. Any idea what is going on with the pip install for pandas and numpy extras?