Use Python connection Mongodb, database operations

1. First installation

Installation module from pymongo import MongoClient pymongo

2. Connect

godb://localhost:27017/')
print(client)
client = MongoClient('localhost', 27017)
print(client)

3. Use Database

#use 数据库
#   等同于：use user_db_2
 db = client['user_db_2']

4. View all collections under the database

# 3、查看库下所有的集合
# print(db.collection_names(include_system_collections=False))

5. Create a collection

user_info# user_info_col = db['user_info']  # 等同于：db.user_info

6. Insert documents

插入单条
user1 = {
    "_id": 2,
    "name": "tank",
    "age": 17
}
user_info_col.insert(user1) #等同于 use user (选择好数据库) 再db.user.insert(user1)  格式：db.哪个集合.insert(变量)
user_info_col.insert_one(user1)

插入多条
user1 = {
    "_id": 5,
    "name": "jason",
    "age": 18
}
user2 = {
    "_id": 6,
    "name": "大饼",
    "age": 19
}
# res = user_info_col.insert_many([user1, user2])
# res = user_info_col.insert([user1, user2])
# print(res)

7. Find

client = MongoClient('localhost', 27017)
print(client)

8. a query

res = col.find_one({"_id": 1})
print(res)

9. Update

col.update({'_id': 1}, {'name': 'TANK'})