Complete Example

#!/usr/bin/python
import pymongo
import random
import os
# There will be security risks if the username and password used for authentication are directly written into code. Store the username and password in ciphertext in the configuration file or environment variables.
# In this example, the username and password are stored in the environment variables. Before running this example, set environment variables EXAMPLE_USERNAME_ENV and EXAMPLE_PASSWORD_ENV as needed.
username = os.getenv('EXAMPLE_USERNAME_ENV')
password = os.getenv('EXAMPLE_PASSWORD_ENV')
mongodbUri = 'mongodb://%s:%s@10.66.187.127:27017/admin'
client = pymongo.MongoClient(mongodbUri % (username, password ))
db = client.somedb
db.user.drop()
element_num=10
for id in range(element_num):
   name = random.choice(['R9','cat','owen','lee','J'])
   sex = random.choice(['male','female'])
   db.user.insert_one({'id':id, 'name':name, 'sex':sex})
content = db.user.find()
for i in content:
   print i

For more information about PyMongo APIs, see the official document.