I am using providers.Factory to create a service, and one of the dependencies is a class to interact with our Redis database.

This line in the code seems to be the offender:
self._client = redis.Redis(host=host, port=port, password=password, db=db, health_check_interval=health_check_interval)

that code is executing in the constructor. if I remove that line or if I change it to
client = redis.Redis(host=host, port=port, password=password, db=db, health_check_interval=health_check_interval)

which doesn't help me but just an observation--then there is no error. I understand what pickling is, but I don't understand what is going on here exactly.