Python操作MongoDB数据库

>>> import pymongo   #导入模块

>>> client = pymongo.MongoClient('localhost', 27017)   #连接服务器

>>> db = client.teacher   #连续数据库

>>> teacher = db.teacher   #数据集

>>> list(teacher.find())   #查看已有记录

[]

>>> wangwu = {'name':'Wangwu', 'age':40, 'sex':'male'}

>>> teacher.insert(wangwu)    #插入数据

ObjectId('5736992446bf3d29e441c594')

>>> zhangsan = {'name':'Zhangsan', 'age':38, 'sex':'male'}

>>> teacher.insert(zhangsan)

ObjectId('57369aea46bf3d29e441c595')

>>> lisi = {'name':'Lisi', 'age':39, 'sex':'male', 'addr':'Shandong'} #同一个数据库的每条记录之间字段个数可以不一样

>>> teacher.insert(lisi)

ObjectId('57369b1846bf3d29e441c596')

>>> for item in teacher.find():    #列出数据库中的所有记录

print(item)

{'age': 40, 'name': 'Wangwu', '_id': ObjectId('5736992446bf3d29e441c594'), 'sex': 'male'}

{'age': 38, 'name': 'Zhangsan', '_id': ObjectId('57369aea46bf3d29e441c595'), 'sex': 'male'}

{'age': 39, 'name': 'Lisi', 'addr': 'Shandong', '_id': ObjectId('57369b1846bf3d29e441c596'), 'sex': 'male'}

>>> teacher.find().count()   #记录条数

3

>>> teacher.update({'name':'Zhangsan'},{'$set':{'age':25}}) #更新记录

{'n': 1, 'nModified': 1, 'ok': 1, 'updatedExisting': True}

>>> for item in teacher.find():

print(item)

{'age': 40, 'name': 'Wangwu', '_id': ObjectId('5736992446bf3d29e441c594'), 'sex': 'male'}

{'age': 25, 'name': 'Zhangsan', '_id': ObjectId('57369aea46bf3d29e441c595'), 'sex': 'male'}

{'age': 39, 'name': 'Lisi', 'addr': 'Shandong', '_id': ObjectId('57369b1846bf3d29e441c596'), 'sex': 'male'}

>>> teacher.remove({'name':'Wangwu'})  #删除一条记录，如果没有参数则表示清空数据库

{'n': 1, 'ok': 1}

>>> teacher.remove({'name':'Wangwu'})

{'n': 0, 'ok': 1}

>>> teacher.find().count()

2