Python操作mongodb数据库进行模糊查询操作示例

本文实例讲述了Python操作mongodb数据库进行模糊查询操作。分享给大家供大家参考，具体如下：

# -*- coding: utf-8 -*- import pymongo import re from pymongo import MongoClient #创建连接 #10.20.66.106 client = MongoClient(10.20.4.79, 27017) #client = MongoClient(10.20.66.106, 27017) db_name = ta db = client[db_name]

假设mongodb数据库中school 集合中有一些数据记录

{ _id : 1, zipcode : 63109, students : { comments : python abc } } { _id : 2, zipcode : 63110, students : { comments : python abc } } { _id : 3, zipcode : 63109, students : { comments : python abc } } { _id : 4, zipcode : 63109, students : { comments : python abc } } { _id : 5, zipcode : 63109, students : { comments : python abc } } { _id : 7, zipcode : 63109, students : { comments : python abc }, school : 102 python abc } { _id : 8, zipcode : 63109, students : { comments : python abc }, school : 100 python abc xyz } { _id : 9, zipcode : 100, students : { name : mike, age : 12, comments : python } } { _id : 10, zipcode : 100, students : { name : Marry, age : 42, comments : this is a python } } { _id : 11, zipcode : 100, students : { name : joe, age : 92, comments : this is a python program } } { _id : 12, zipcode : 100, students : { name : joedd, age : 34, comments : python is a script language } }

现在要对students中comments的数据进行模糊查询, python中模糊查询要借助正则表达式：

1、查询comments中包含abc的记录：

结果如下：

{ustudents: {ucomments: upython abc}, u_id: 1.0, uzipcode: u63109}
{ustudents: {ucomments: upython abc}, u_id: 2.0, uzipcode: u63110}
{ustudents: {ucomments: upython abc}, u_id: 3.0, uzipcode: u63109}
{ustudents: {ucomments: upython abc}, u_id: 4.0, uzipcode: u63109}
{ustudents: {ucomments: upython abc}, u_id: 5.0, uzipcode: u63109}
{ustudents: {ucomments: upython abc}, uschool: u102 python abc, u_id: 7.0, uzipcode: u63109}
{ustudents: {ucomments: upython abc}, uschool: u100 python abc xyz, u_id: 8.0, uzipcode: u63109}

2、查询comments中包含this is的记录：

for u in db.school.find({students.comments:re.compile(this is)}): 　　print u

结果如下：

{ustudents: {uage: 42.0, uname: uMarry, ucomments: uthis is a python}, u_id: 10.0, uzipcode: u100}
{ustudents: {uage: 92.0, uname: ujoe, ucomments: uthis is a python program}, u_id: 11.0, uzipcode: u100}

由此可见，模糊查询要用到re模块，查询条件利用re.compile()函数

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希望本文所述对大家Python程序设计有所帮助。