https://university.mongodb.com/courses/MongoDB/M101P/2017_January/courseware/Chapter_6_Application_Engineering/52b368fde2d423678d3b9d5a/vertical_e68390d69722

pymongo_to_replicaset.py

import pymongo
import sys

c = pymongo.MongoClient(host=["mongodb://localhost:27017",
                              "mongodb://localhost:27018",
                              "mongodb://localhost:27019"],
                               replicaSet="m101",
                              w=1,
                              j=True)

db = c.m101
people = db.people

try:
    print "inserting"
    people.insert_one({"name":"Andrew Erlichson", "favorite_color":"blue"})
    print "inserting"
    people.insert_one({"name":"Richard Krueter", "favorite_color":"red"})
    print "inserting"
    people.insert_one({"name":"Dwight Merriman", "favorite_color":"green"})
except Exception as e:
    print "Unexpected error:", type(e), e
print "completed the inserts"