Python操作MongoDb数据库流程详解

>zhangsan = {‘name': ‘Zhangsan', ‘age': 18, ‘gender': ‘male'}
>db.students.insert(zhangsan)
>lisi = {‘name': ‘Lisi', ‘age': 19, ‘gender': ‘male'}
>db.students.insert(lisi)

#! /usr/bin/env python3
# -*- coding:utf-8 -*-

# Author : MaYi
# Blog  : http://www.cnblogs.com/mayi0312/
# Date  : 2019-12-25
# Name  : test01
# Software : PyCharm
# Note  : 应用pymongo模块操作MongoDB数据库
# 导入模块
import pymongo

# 连接数据库，27017是默认端口
client = pymongo.MongoClient("localhost", 27017)
# 获取数据库
db = client.students

# 打印数据集合名称列表
print(db.collection_names)

# 获取数据集合
res = db.students.find()
print(res)
for item in res:
 # 遍历数据
 print(item)

wangwu = {"name": "Wangwu", "age": 20, "sex": "male"}
# 插入一条记录
db.students.insert(wangwu)

for item in db.students.find({"name": "Wangwu"}):
 # 指定查询条件
 print(item)

# 获取一条记录
print(db.students.find_one())
print(db.students.find_one({"name": "Wangwu"}))

# 记录总数
print(db.students.find().count())

# 删除一条记录
db.students.remove({"name": "Wangwu"})

# 创建索引
db.students.create_index([("name", pymongo.ASCENDING)])

# 更新数据库
db.students.update({"name": "Zhangsan"}, {"$set": {"age": 25}})

# 清空数据库
db.students.remove()

# 插入多条数据
zhangsan = {"name": "Zhangsan", "age": 20, "gender": "male"}
lisi = {"name": "Lisi", "age": 21, "gender": "male"}
wangwu = {"name": "Wangwu", "age": 22, "gender": "female"}
db.students.insert_many([zhangsan, lisi, wangwu])

# 对查询结果排序
for item in db.students.find().sort("name", pymongo.ASCENDING):
 print(item)

# 入口函数
if __name__ == '__main__':
 pass