from pymongo import MongoClient

client = MongoClient()

database= client.chapter_3

collection = database.example_data_1

# rows = collection.find({'age': {'$lt': 25, '$gt': 21},

# 'name': {'$ne': '夏侯小七'}})

# for row in rows:

# print(row)

# result = collection.update_many(

# {'name': '公孙小八'},

# {'$set': {'address': '美国', 'age': 80}}

# )

# result = collection.update_one({'name': '隐身人'},

# {'$set': {'name': '隐身人',

# 'age': 0,

# 'address': '里世界'}},

# upsert=True)

# result = collection.delete_many({'age': 0})

# print(result)