3.23-作业

# 一：编写函数，（函数执行的时间用time.sleep(n)模拟）

import time


def timeer(x, y):
    res = x + y
    time.sleep(2)
    print("timeer>>>%s:" % res)

timeer(1,2)

# 二：编写装饰器，为函数加上统计时间的功能

import time
def out(func):
    def index(*args,**kwargs):
        time.sleep(0.3)
        start = time.time()
        res = func(*args,**kwargs)
        stop = time.time()
        print(stop - start)
        return res
    return index
index = outer(index)
index(1,2)

# 三：编写装饰器，为函数加上认证的功能

import time
def out(func):
    def wapper(*args,**kwargs):
        time.sleep(0.3)
        start = time.time()
        res = func(*args,**kwargs)
        stop = time.time()
        print(stop - start)
        return res
    return wapper

@out
def index(x,y):
    time.sleep(0.3)
    print("index>>>:%s %s"%(x,y))

index(1,2)

四：编写装饰器，为多个函数加上认证的功能（用户的账号密码来源于文件），
要求登录成功一次，后续的函数都无需再输入用户名和密码
注意：从文件中读出字符串形式的字典，可以用eval('{"name":"egon","password":"123"}')转成字典格式

def auth(func):
    def wapper(*args, **kwargs):
        name = input("name>>>:").strip()
        password = input("password>>>:").strip()
        # password = int(password)
        with open("bb.txt", "rt", encoding="utf-8") as file:
            for line in file:
                user, pwd = line.strip().split(":")
                if name == user and password == pwd:
                    start = time.time()
                    res = func(*args, **kwargs)
                    stop = time.time()
                    print(stop - start)
                    return res
                else:
                    print("error")

    return wapper


@auth
def index():
    time.sleep(5)
    print("login successful")


index()

五：编写装饰器，为多个函数加上认证功能，要求登录成功一次，
在超时时间内无需重复登录，超过了超时时间，则必须重新登录

import time

def login():
    name = input("name>>>:").strip()
    password = input("password>>>:").strip()
    with open("bb.txt", "rt", encoding="utf-8") as file:
        for line in file:
            user, pwd = line.strip().split(":")
            if name == user and password == pwd:
                print("login successful")
            else:
                print("error")
def wait(func):
    wait = 5
    def index(*args,**kwargs):
        start = time.time()
        res = func(*args,**kwargs)
        stop = time.time()
        result = stop - start
        if result >= wait:
            login()
        else:
            return res
    return index

@wait
def use():
    time.sleep(6)
    print("successful")

use()

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