envs.py

import redis

def ext_pillar(minion_id, pillar, **kw):
  data = {}

  host = kw.get('host', 'localhost')
  port = kw.get('port', 6379)

  r = redis.StrictRedis(host=host, port=port, db=0)

keys.txt

    - __builtins__
    - __doc__
    - __file__
    - __grains__
    - __name__
    - __opts__
    - __package__
    - __pillar__
    - __salt__
    - ext_pillar

output.log

[ERROR   ] Failed to load ext_pillar envs: 'module' object has no attribute 'StrictRedis'
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/salt/pillar/__init__.py", line 515, in ext_pillar
    key)
  File "/usr/lib/python2.7/dist-packages/salt/pillar/__init__.py", line 476, in _external_pillar_data
    ext = self.ext_pillars[key](self.opts['id'], pillar, **val)
  File "/srv/salt-states/modules/pillar/envs.py", line 9, in ext_pillar
    r = redis.StrictRedis(host=host, port=port, db=0)
AttributeError: 'module' object has no attribute 'StrictRedis'