MongoClient complains about dnspython module not installed for one user only

[Arjaan Buijk]

When I call MongoClient (v3.7.1) with `mongodb+srv` option, it gives this
error:

File "/opt/anaconda3/lib/python3.6/site-packages/pymongo/uri_parser.py",
line 351, in parse_uri
raise ConfigurationError('The "dnspython" module must be '

pymongo.errors.ConfigurationError: The "dnspython" module must be installed
to use mongodb+srv:// URIs

However:
(-) the dnspython is installed, verified by: import dns.
(-) everything works ok for other users

Any ideas?

Arjaan Buijk