pip install pymongo

import pymongo

# 建立连接

client = pymongo.MongoClient()

# 指定数据库 (不存在则会新建)

db = client['py_mongo']

# 删除数据库

# client.drop_database('py_mongo_temp')

# 创建集合

# db.create_collection('col_temp')

# 删除集合

# print(db.drop_collection('col_temp'))

# 指定集合 (不存在则会新建)

collection = db['mongo_col']

# collection = pymongo.MongoClient()['py_mongo']['mongo_col']

基本使用：insert() 、 remove() 、 update() 、 find()

# 增 insert()

# 如果不指定_id参数，MongoDB会为文档分配一个唯一的ObjectId

# 增加一条

# collection.insert({'_id':1,'name':'JiYu','num':0})

# 增加多条

# collection.insert( [

# {'name':'jiyu','num':12},

# {'name':'jiyu','num':34},

# {'name':'nianhua','num':12},

# {'name':'nianhua','num':34},

# ] )

# 删 remove()

# 删除集合中满足条件的所有文档

# collection.remove({'name':'jiyu'})

# 只删除集合中满足条件的第一条文档

# collection.remove({'name':'nianhua'},multi=False)

# 删除所有

# collection.remove()

# 改 update()

# 修改一条数据 只有name，没有num了，整条数据变成里的内容

# collection.update({'name':'jiyu'},{'name':'nianhua'})

# 指定属性修改 $set

# collection.update({'name':'jiyu'},{'$set':{'name':'nianhua'}})

# 修改集合中所有满足条件的文档：multi: true

# collection.update({'name':'nianhua'},{'$set':{'name':'NianHua'}},multi=True)

# 查 find()

# 查询所有

# for i in collection.find():

# print(i)

# 根据条件查询

# for i in collection.find({'name': 'NianHua'}):

# print(i)

# and 和 or 条件

# condition = {'$or': [{'num': 12}, {'name': 'NianHua'}]}

# for i in collection.find(condition):

# print(i)

# 操作符

# for i in collection.find({'num': {'$gt': 20}}):

# print(i)

官方推荐：insert_one() 、 delete_one() 、 update_one() 、 find_one()

# 增 insert_one() insert_many()

# 添加一条

# collection.insert_one({'name':'ming','num':101})

# 添加多条

# collection.insert_many( [

# {'name':'hong','num':111},

# {'name':'fei','num':111}

# ] )

# 删 delete_one() delete_many()

# 删除一条

# collection.delete_one({'num': 111})

# 删除多条

# collection.delete_many({'name':'NianHua'})

# 改 update_one() update_many()

# 需要用$进行操作，加上$set，否则会报错：update only works with $ operators

# 修改一条

# collection.update_one({'name':'jiyu'},{'$set':{'num':99}})

# 修改多条

# collection.update_many({'name':'jiyu'},{'$set':{'num':99}})

# 查 find_one() find()

# 查一条

# print(collection.find_one({'num':111}))

# 查找所有 find() 只是一个对象 用for 遍历出来

for i in collection.find():

print(i)