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：
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# -*- coding: utf-8 -*-import pymongoimport refrom pymongo import MongoClient#創(chuàng)建連接#10.20.66.106client = 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
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{ "_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：
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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'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：
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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。
原文鏈接：https://www.cnblogs.com/shaosks/p/5740629.html
