This should work
sm.Probit(np.random.randint(2, size=20), np.random.random((20, 2)), missing='raise')
BUG: Allow missing='raise' and no missing data. Closes #1700
try to avoid to put pep-8 changes in the same commit, It's really difficult to see how this got fixed.
Err, I did. Try that is. I'll fix it.