Python的orm数据存储有三大类型:
pymysl,sqlachemy,peewee
安装:
pip install pymysql【解决peewee的驱动依赖问题】
pip install peewee
peewee的具体实现如下:
from peewee import * db = MySQLDatabase("spider", host="127.0.0.1", port=3306, user="root", password="root") class Person(Model): name = CharField(max_length=20) birthday = DateField() class Meta: database = db # This model uses the "people.db" database. table_name = "users"#修改表名字,一般默认为person。小写的类名 #数据的增、删、改、查 if __name__ == "__main__": db.create_tables([Person]) #这个列表传入的参数将表示产生的表
peewee的增删改查
from datetime import date #生成数据 # uncle_bob = Person(name='Bob', birthday=date(1960, 1, 15)) # uncle_bob.save() # bob is now stored in the database # #查询数据(只获取一条) get方法在取不到数据会抛出异常 # bobby = Person.select().where(Person.name == 'Bob').get() # print(bobby.birthday) # a = 1 # bobby = Person.get(Person.name == 'bobb') # print(bobby.birthday) #query是modelselect对象 可以当做list来操作 __getitem__ query = Person.select().where(Person.name == 'Bob') for person in query: person.delete_instance() # person.birthday = date(1960, 1, 17) # person.save() #在没有数据存在的时候新增数据,存在的时候修改数据