欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

Python操作mongodb数据库进行模糊查询操作示例

程序员文章站 2022-06-13 14:27:03
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 -*- impor...

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。