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Python操作mongodb數(shù)據(jù)庫進(jìn)行模糊查詢操作示例

更新時(shí)間：2018年06月09日 12:47:33 作者：shaomine

這篇文章主要介紹了Python操作mongodb數(shù)據(jù)庫進(jìn)行模糊查詢操作,結(jié)合實(shí)例形式分析了Python連接MongoDB數(shù)據(jù)庫及使用正則表達(dá)式進(jìn)行模糊查詢的相關(guān)操作技巧,需要的朋友可以參考下

本文實(shí)例講述了Python操作mongodb數(shù)據(jù)庫進(jìn)行模糊查詢操作。分享給大家供大家參考，具體如下：

# -*- coding: utf-8 -*-
import pymongo
import re
from pymongo import MongoClient
#創(chuàng)建連接
#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]

假設(shè)mongodb數(shù)據(jù)庫中school 集合中有一些數(shù)據(jù)記錄

{ "_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" } }

現(xiàn)在要對(duì)students中comments的數(shù)據(jù)進(jìn)行模糊查詢, python中模糊查詢要借助正則表達(dá)式：

1、查詢comments中包含"abc"的記錄：

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

結(jié)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、查詢comments中包含"this is"的記錄：

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

結(jié)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'}

由此可見，模糊查詢要用到re模塊，查詢條件利用re.compile()函數(shù)

更多關(guān)于Python相關(guān)內(nèi)容感興趣的讀者可查看本站專題：《Python常見數(shù)據(jù)庫操作技巧匯總》、《Python數(shù)學(xué)運(yùn)算技巧總結(jié)》、《Python數(shù)據(jù)結(jié)構(gòu)與算法教程》、《Python函數(shù)使用技巧總結(jié)》、《Python字符串操作技巧匯總》、《Python入門與進(jìn)階經(jīng)典教程》及《Python文件與目錄操作技巧匯總》

希望本文所述對(duì)大家Python程序設(shè)計(jì)有所幫助。

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