python连接mongodb数据库操作数据示例

作者： wyh草样

出处：https://www.cnblogs.com/wyh0923/p/14047466.html

1、数据库配置类 MongoDBConn.py

#encoding=utf-8
'''

Mongo Conn连接类
'''

import pymongo

class DBConn:
 conn = None
 servers = "mongodb://localhost:27017"

def connect(self):
   self.conn = pymongo.Connection(self.servers)

def close(self):
   return self.conn.disconnect()

def getConn(self):
   return self.conn

2、ngoDemo.py 类

#encoding=utf-8
'''

Mongo操作Demo
Done:
'''
import MongoDBConn

dbconn = MongoDBConn.DBConn()
conn = None
lifeba_users = None

def process():
 #建立连接
 dbconn.connect()
 global conn
 conn = dbconn.getConn()

#列出server_info信息
 print conn.server_info()

#列出全部数据库
 databases = conn.database_names()
 print databases

#删除库和表
 dropTable()
 #添加数据库lifeba及表(collections)users
 createTable()
 #插入数据
 insertDatas()
 #更新数据
 updateData()
 #查询数据
 queryData()
 #删除数据
 deleteData()

#释放连接
 dbconn.close()

def insertDatas():
 datas=[{"name":"steven1","realname":"测试1","age":25},
     {"name":"steven2","realname":"测试2","age":26},
     {"name":"steven1","realname":"测试3","age":23}]
 lifeba_users.insert(datas)

def updateData():
 '''只修改最后一条匹配到的数据
     第3个参数设置为True,没找到该数据就添加一条
     第4个参数设置为True,有多条记录就不更新
 '''
 lifeba_users.update({'name':'steven1'},{'$set':{'realname':'测试1修改'}}, False,False)

def deleteData():
 lifeba_users.remove({'name':'steven1'})

def queryData():
 #查询全部数据
 rows = lifeba_users.find()
 printResult(rows)
 #查询一个数据
 print lifeba_users.find_one()
 #带条件查询
 printResult(lifeba_users.find({'name':'steven2'}))
 printResult(lifeba_users.find({'name':{'$gt':25}}))

def createTable():
 '''创建库和表'''
 global lifeba_users
 lifeba_users = conn.lifeba.users

def dropTable():
 '''删除表'''
 global conn
 conn.drop_database("lifeba")

def printResult(rows):
 for row in rows:
   for key in row.keys():#遍历字典
     print row[key], #加, 不换行打印
   print ''

if __name__ == '__main__':
 process()

来源：https://www.cnblogs.com/wyh0923/p/14047466.html