zoukankan      html  css  js  c++  java
  • python常用模块-pymongo

    主要就是:连接配置 + 增删改查

    from pymongo import MongoClient
    from data.pwd import mongo_pwd

    # 命令行模式下,脚本里可适当稍加改动。

    # 无需密码的连接
    client1 = MongoClient("mongodb://127.0.0.1:27017")
    db = client1.school
    for student in db.students.find():
    print("学号:",student['stu_id'])
    db.students.find().count()
    db.students.remove()
    coll = db.students
    coll.insert({"key1":"value1"})
    coll.insert_one({"key1":"value1"})
    coll.insert_many({"key1":"value1"},{"key1","value2"})

    # 有密码的连接
    host = '127.0.0.1'
    client2 = MongoClient(host,27017)
    db = client2.admin #偶尔有时不能直接连mydb,可先直连admin,后面再切mydb = client.mydb
    db.authenticate("username",mongo_pwd)
    # db.authenticate("username",mongo_pwd,mechanism="MONGODB-CR")
    # mongodb版本3.0 以后,默认是mechanism="SCRAM-SHA-1";之前的带MONGODB-CR
    collection = db.mytest
    collection.insert({"key1":"value1"})

    # 通常可以这样

    client = pymongo.MongoClient(host='localhost', port=27017)
    db = client.mytest
    collection = db.person
    res = collection.find_one()

    person = { "name": "Mike"}
    collection.insert(person)
    cur = collection.find()
    for c in cur:
    print c

    condition = {'name': 'Mike'}
    student = collection.find_one(condition)
    student['age'] = 25
    res = collection.update(condition, student)
    res = collection.remove({"name": "Mike"})

    # 在实际工作中个别关键值,如果经常来回增删或类似按钮的切换,也可以设置is_delete类的键,通过键为True或 False,来定义它的状态。

  • 相关阅读:
    [总结]链表与栈
    统计学基础知识
    图卷积神经网络(GCN)入门
    [总结]字符串
    [总结]数组
    [总结]排序算法分析与实现
    [Leetcode]307. Range Sum Query
    深度解析Droupout与Batch Normalization
    深度解析Graph Embedding
    Console命令,让js调试更简单
  • 原文地址:https://www.cnblogs.com/bernard-shen/p/14465329.html
Copyright © 2011-2022 走看看