day21作业

# setting.py
import os
DB_PATH = os.path.dirname(__file__)
HOST_NAME = "127.0.0.1"
PORT = 3362

import time
import hashlib
import os
import pickle
import setting
import math
import abc
class MySQL():
    def __init__(self, host, port):
        self.host = host
        self.port = port
        self.id = self.create_id()

    def create_id(self):
        md5 = hashlib.md5()
        value_for_id = self.host + str(self.port) + str(time.time())
        md5.update(value_for_id.encode("utf-8"))
        return md5.hexdigest()

    def save(self):
        file = os.path.join(setting.DB_PATH, self.id)
        if os.path.exists(file):
            print("文件已经存在")
            raise FileExistsError
        with open(file, "wb") as f:
            pickle.dump(self, f)

    @staticmethod
    def get_obj_by_id(id):
        file = os.path.join(setting.DB_PATH, id)
        with open(file, "rb") as  f:
            return pickle.load(f)

    @classmethod
    def from_conf(cls):
        return cls(setting.HOST_NAME, setting.PORT)



db = MySQL.from_conf()
db.save()
id = "5b84d6b4aece19b2ce38f78a6d620f17"
db1 = MySQL.get_obj_by_id(id)
print(db1.id)
class Circle():
    def __init__(self, radius):
        self.__radius = radius
    @property
    def circumference(self):
        return math.pi * self.__radius * self.__radius
    @property
    def area(self):
        return 2 * math.pi * self.__radius

c = Circle(4)
print(c.area)
print(c.circumference)

class Phone(metaclass=abc.ABCMeta):
    @abc.abstractmethod
    def call(self):
        return self.call()

    @abc.abstractmethod
    def charge(self):
        return self.charge()

class Apple(Phone):
    def call(self):
        print("iphone is calling")
    def charge(self):
        print("iphone is charging")

class HuaWei(Phone):
    def call(self):
        print("Huawei is calling")
    def charge(self):
        print("Huawei is charging")

a1 = Apple()
a1.charge()
a1.call()
h1 = HuaWei()
h1.charge()
h1.call()