from pymongo import MongoClient

client = MongoClient('mongodb://user:pass@localhost:27027/db_name')
db = client.get_database('collection')

print(client.server_info())
print(db)
collection = db.get_collection(name='collection')
print(collection)
print(client.list_database_names())
print(db.list_collection_names())

Database(MongoClient(host=['localhost:27027'], document_class=dict, tz_aware=False, connect=True), 'db_name')
Collection(Database(MongoClient(host=['localhost:27027'], document_class=dict, tz_aware=False, connect=True), 'db_name'), 'collection')
Traceback (most recent call last):
_select_servers_loop
    raise ServerSelectionTimeoutError(
pymongo.errors.ServerSelectionTimeoutError: mongo_node2: [Errno 8] nodename nor servname provided, or not known,mongo_node1:27017: [Errno 8] nodename nor servname provided, or not known, Timeout: 30s, Topology Description: <TopologyDescription id: 626bfa46ee3d10768ccaef7e, topology_type: ReplicaSetNoPrimary, servers: [<ServerDescription ('mongo_node1', 27017) server_type: Unknown, rtt: None, error=AutoReconnect('mongo_node1:27017: [Errno 8] nodename nor servname provided, or not known')>, <ServerDescription ('mongo_node2', 27017) server_type: Unknown, rtt: None, error=AutoReconnect('mongo_node2:27017: [Errno 8] nodename nor servname provided, or not known')>]>