python peewee 有什么用？

#coding=utf-8
from datetime import datetime
from db import *
database.connect()
# 打印出所有元素
for i in Dmoz.select():
    print i.description
    print i.__dict__
# 增加数据
for i in range(10):
    print Dmoz.create(description="user", link="HuaDong", title="100000%s" % str(i))
# 删除数据
band = Dmoz.get(Dmoz.title == "1000001")
band.delete_instance()
# select语句
band = Dmoz.select().where(Dmoz.title == "1000000").get()
print band.link
# 更改数据
band = Dmoz.get(Dmoz.title == "1000000")
print band.link
band.link = "Beach Boys"
band.save()
print  band.link
# 连表查询，peewee也支持join语句
# album = Album.select().join(Dmoz).where(
#         (Album.title == "Thrive") & amp;
# (Dmoz.name == "Newsboys")
# ).get()
# album.title = "Step Up to the Microphone"
# album.save()