用python实现操作mongodb的插入和查找操作

import pymongoclient = pymongo.MongoClient("mongo://localhost:27017")
db = client["app"]
col = db["C1"]# 插入一条数据
#user = {
#    "name": "Sam",
#    "age": 20,
#    "email": "sam@gmail.com"
#}#res = col.insert_one(user)
#print(res.inserted_id)# 插入多条数据
user = [{"name": "Sam","age": 20,"email": "sam@gmail.com"
},
{"name": "Peter","age": 21,"email": "peter@gmail.com"
},
{"name": "Lily","age": 23,"email": "lily@gmail.com"
}
]res = col.insert_many(user)
print(res.inserted_ids)#查看所有数据
users = col.find()
for user in users:# print(user)print(user["name"])# 条件查找
user_name = col.find({"name":"Sam"})
for user in user_name:print(user)
# 大于20
user_age = col.find({"age":{"$gt":20}})
for user in user_age:print(user)
# 正则包含a
user_name = col.find({"name":{"$regex":"a"}})
# 正则以S开头
user_name = col.find({"name":{"$regex":"^S"}})
for user in user_name:print(user)