Python操作MongoDB数据库的方法示例
本文实例讲述了Python操作MongoDB数据库的方法。分享给大家供大家参考，具体如下：
>>>importpymongo
>>>client=pymongo.MongoClient('localhost',27017)
>>>db=client.students
>>>db.collection_names()
['students']
>>>students=db.students
>>>students.find()
>>>foriteminstudents.find():
print(item)
{'_id':ObjectId('59394a87ae09c56bd9c1d375'),'name':'zhangsan','age':18.0,'sex':'male'}
>>>wangwu={'name':'wangwu','age':20,'sex':'male'}
>>>students.insert(wangwu)
ObjectId('593a7c5fedb5a1abeb757052')
>>>foriteminstudents.find({'name':'wangwu'}):
print(item)
{'_id':ObjectId('593a7c5fedb5a1abeb757052'),'name':'wangwu','age':20,'sex':'male'}
>>>students.find_one()
{'_id':ObjectId('59394a87ae09c56bd9c1d375'),'name':'zhangsan','age':18.0,'sex':'male'}
>>>students.find_one({'name':'wangwu'})
{'_id':ObjectId('593a7c5fedb5a1abeb757052'),'name':'wangwu','age':20,'sex':'male'}
>>>students.find().count()
2
>>>students.remove({'name':'wangwu'})
{'ok':1,'n':1}
>>>foriteminstudents.find():
print(item)
{'_id':ObjectId('59394a87ae09c56bd9c1d375'),'name':'zhangsan','age':18.0,'sex':'male'}
>>>students.find().count()
1
>>>students.create_index([('name',pymongo.ASCENDING)])
'name_1'
>>>students.update({'name':'zhangsan'},{'$set':{'age':25}})
{'ok':1,'nModified':1,'n':1,'updatedExisting':True}
>>>students.find_one()
{'_id':ObjectId('59394a87ae09c56bd9c1d375'),'name':'zhangsan','age':25,'sex':'male'}
>>>students.update({'age':25},{'$set':{'sex':'Female'}})
{'ok':1,'nModified':1,'n':1,'updatedExisting':True}
>>>students.remove()
{'ok':1,'n':1}
>>>students.find().count()
0
>>>zhangsan={'name':'zhangsan','age':25,'sex':'Male'}
>>>lisi={'name':'lisi','age':21,'sex':'Male'}
>>>wangwu={'name':'wangwu','age':22,'sex':'Female'}
>>>students.insert_many([zhangsan,lisi,wangwu])
>>>foriteminstudents.find().sort('name',pymongo.ASCENDING):
print(item)
{'_id':ObjectId('593a806bedb5a1abeb757054'),'name':'lisi','age':21,'sex':'Male'}
{'_id':ObjectId('593a806bedb5a1abeb757055'),'name':'wangwu','age':22,'sex':'Female'}
{'_id':ObjectId('593a806bedb5a1abeb757053'),'name':'zhangsan','age':25,'sex':'Male'}
>>>foriteminstudents.find().sort([('sex',pymongo.DESCENDING),('name',pymongo.ASCENDING)]):
print(item)
{'_id':ObjectId('593a806bedb5a1abeb757054'),'name':'lisi','age':21,'sex':'Male'}
{'_id':ObjectId('593a806bedb5a1abeb757053'),'name':'zhangsan','age':25,'sex':'Male'}
{'_id':ObjectId('593a806bedb5a1abeb757055'),'name':'wangwu','age':22,'sex':'Female'}
>>>
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希望本文所述对大家Python程序设计有所帮助。
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