from pymongo import MongoClient

from pprint import pprint

# 连接数据库

client = MongoClient('localhost', 27017)

# 选择数据库

db = client['hello']

# 获取集合

user = db.user

# 插入数据

user.insert_one({"_id": 1, "name": "yitian", "age": 24})

user.insert_one({"_id": 2, "name": "zhang3", "age": 25})

user.insert_one({"_id": 3, "name": "li4", "age": 26})

# 更新数据

user.update_one({"_id": 1}, {"$set": {"name": "易天"}})

user.update_many({}, {"$inc": {"age": 1}})

# 查询数据

yitian = user.find_one({"name": "yitian"})

yitian = user.find_one({"_id": 1})

pprint(yitian)

print("------所有数据--------")

for u in user.find():

pprint(u)

print("------年龄大于25的--------")

for u in user.find({"age": {"$gt": 25}}):

pprint(u)

# 删除所有数据

user.remove({})