本文實例講述了Python操作mongodb數據庫進行模糊查詢操作。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mongodb數據庫中school 集合中有一些數據記錄

{ "_id" : 1,"zipcode" : "63109","students" : { "comments" : "python abc" } }

{ "_id" : 2,"zipcode" : "63110","students" : { "comments" : "python abc" } }

{ "_id" : 3,"students" : { "comments" : "python abc" } }

{ "_id" : 4,"students" : { "comments" : "python abc" } }

{ "_id" : 5,"students" : { "comments" : "python abc" } }

{ "_id" : 7,"students" : { "comments" : "python abc" },"school" : "102 python abc" }

{ "_id" : 8,"school" : "100 python abc xyz" }

{ "_id" : 9,"zipcode" : "100","students" : { "name" : "mike","age" : 12,"comments" : "python" } }

{ "_id" : 10,"students" : { "name" : "Marry","age" : 42,"comments" : "this is a python" } }

{ "_id" : 11,"students" : { "name" : "joe","age" : 92,"comments" : "this is a python program" } }

{ "_id" : 12,"students" : { "name" : "joedd","age" : 34,"comments" : "python is a script language" } }

現在要對students中comments的數據進行模糊查詢,python中模糊查詢要借助正則表達式：

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'_id': 4.0,u'_id': 5.0,u'school': u'102 python abc',u'_id': 7.0,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

希望本文所述對大家Python程序設計有所幫助。

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