>>> AutoEncryptionOpts()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: __init__() takes at least 3 arguments (1 given)
>>> AutoEncryptionOpts({}, 'v.v')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/shane/venv27/lib/python2.7/site-packages/pymongo/encryption_options.py", line 116, in __init__
    "client side encryption requires the pymongocrypt library: "
pymongo.errors.ConfigurationError: client side encryption requires the pymongocrypt library: install a compatible version with: python -m pip install pymongo['encryption']

$ python -m pip install pymongo['encryption']
zsh: no matches found: pymongo[encryption]

python -m pip install 'pymongo[encryption]'