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：
for u in db.school.find({'students.comments':re.compile('abc')}):
print u
结果如下：
{u'students': {u'comments': u'python abc'}, u'_id': 1.0, u'zipcode': u'63109'}
{u'students': {u'comments': u'python abc'}, u'_id': 2.0, u'zipcode': u'63110'}
{u'students': {u'comments': u'python abc'}, u'_id': 3.0, u'zipcode': u'63109'}
{u'students': {u'comments': u'python abc'}, u'_id': 4.0, u'zipcode': u'63109'}
{u'students': {u'comments': u'python abc'}, u'_id': 5.0, u'zipcode': u'63109'}
{u'students': {u'comments': u'python abc'}, u'school': u'102 python abc', u'_id': 7.0, u'zipcode': u'63109'}
{u'students': {u'comments': u'python abc'}, u'school': u'100 python abc xyz', u'_id': 8.0, u'zipcode': u'63109'}
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：
{u'students': {u'age': 42.0, u'name': u'Marry', u'comments': u'this is a python'}, u'_id': 10.0, u'zipcode': u'100'}
{u'students': {u'age': 92.0, u'name': u'joe', u'comments': u'this is a python program'}, u'_id': 11.0, u'zipcode': u'100'}
由此可见，模糊查询要用到re模块，查询条件利用re.compile()函数
更多关于Python相关内容感兴趣的读者可查看本站专题：《Python常见数据库操作技巧汇总》、《Python数学运算技巧总结》、《Python数据结构与算法教程》、《Python函数使用技巧总结》、《Python字符串操作技巧汇总》、《Python入门与进阶经典教程》及《Python文件与目录操作技巧汇总》
希望本文所述对大家Python程序设计有所帮助。
上一篇：python使用matplotlib模块绘制多条折线图、散点图
栏 目：Python代码
本文标题：Python操作mongodb数据库进行模糊查询操作示例
本文地址：http://www.codeinn.net/misctech/125813.html
