pymongo

import pymongofrom bson import ObjectIdimport jsonmongo_client=pymongo.MongoClient(host='127.0.0.1',port=27017) #连接数据库MONGO=mongo_client['xxx'] #找到所要查的表

"""#查询数据res=MONGO.xxx.find({})  #生成器for i in res:     print(i)

res1=list(MONGO.xxx.find({}))print(res1)

res=MONGO.xxx.find_one({'id':20})  #去单个 用find_one# print(type(res),res.get('name'),res.get('_id'))res['_id']=str(res['_id'])print(res)res_json=json.dumps(res)print(res_json)   #{"_id": "5c21f8ce902f3125d4f4c0ee", "id": 20, "name": 123}

res_obj=MONGO.xxx.find_one({'_id':ObjectId(res['_id'])})print(res_obj)  #{'_id': ObjectId('5c21f8ce902f3125d4f4c0ee'), 'id': 20, 'name': 123}

# $or操作res=MONGO.xxx.find_one({'id':20})res1=list(MONGO.xxx.find({"$or":[{'id':20},{'name':123}]}))print(res1)"""

'''#增加数据res=MONGO.xxx.insert_one({'name':'qwe','age':13})print(res,res.inserted_id)  #对象可以直接. res.inserted_id 5c21ff4311681e0858c20b91

res=MONGO.xxx.insert_many([{'name':'asd','age':12},{'name':'aaa','age':14}])print(res,res.inserted_ids)  #存多个用res.inserted_ids'''

"""#修改数据

res=MONGO.xxx.update_one({'id':3},{'$set':{'id':6}})print(res,dir(res),res.raw_result)

res=MONGO.xxx.update_many({'id':2},{'$set':{'id':3}})print(res,dir(res),res.raw_result)    #{'n': 38, 'nModified': 38, 'ok': 1.0, 'updatedExisting': True}    #修改38个"""

"""#删除数据res=MONGO.xxx.delete_one({'id':6})res=MONGO.xxx.delete_many({'name':'qwe'})print(res,dir(res),res.raw_result)"""

"""#分页 limit  跳转 skip  排序 sortres=list(MONGO.xxx.find({"id":3}).limit(5))print(res,len(res))

res=list(MONGO.xxx.find({}).limit(5).skip(2))print(res,len(res))

#pymongo.DESCENDING res=list(MONGO.xxx.find({}).sort('id',-1).limit(5).skip(5))print(res,len(res))"""

"""#python 的update

res=MONGO.xxx.find_one({'id':3})print(res)  #查看全部

#更改数据res.get('xxx')['shengao']=170res.get('xxx')['long']=20

#用对象来改数据MONGO.xxx.update_one({'_id':res.get('_id')},{'$set':res})res=MONGO.xxx.find_one({'id':3})print(res)

"""