day14作业

# 一：编写函数，（函数执行的时间用time.sleep(n)模拟）
# import time
#
# def wrapper(f):
#     def inner(*args, **kwargs):
#         start_time = time.time()
#         ret = f(*args, **kwargs)
#         time.sleep(1)
#         stop_time = time.time()
#         print('运行时间为%s' % (stop_time - start_time))
#         return ret
#
#     return inner


# 二：编写装饰器，为函数加上统计时间的功能
# import time
#
#
# def wrapper(f):
#     def inner(*args, **kwargs):
#         start_time = time.time()
#         ret = f(*args, **kwargs)
#         stop_time = time.time()
#         print('运行时间为%s' % (stop_time - start_time))
#         return ret
#
#     return inner
#
#
# l = []
#
#
# @wrapper
# def test():
#     time.sleep(0.5)
#     for i in range(100):
#         l.append(i)
#     print(l)
#
#
# test()



# 三：编写装饰器，为函数加上认证的功能
# def wrapper(f):
#     def inner(*args,**kwargs):
#         name = input('账号')
#         pasd = input("密码")
#         if name == 'chen' and pasd == 'chen':
#             msg = f(*args,**kwargs)
#             return msg
#         else:
#             print('error')
#     return inner
# @wrapper
# def amt():
#     print('可选界面')
# amt()


# 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
# import time
# username = None
#
# def wrapper(func):
#     def inner(*args,**kwargs):
#         if username == None:
#             login()
#             func1()
#         else:
#             msg = func(*args, **kwargs)
#             return msg
#     return inner
#
# def login():
#     global username
#     tag = 1
#     while tag <= 3:
#         name = input('账号')
#         pasd = input('密码')
#         with open('db.txt', 'r', encoding='utf-8') as f:
#             for line in f:
#                 if name in line:
#                     user = line.strip('
').split(':')
#                     if name == user[0] and pasd == user[1]:
#                         print('登录成功')
#                         username = 1
#
#                         tag = 4
#                     else:
#                         tag += 1
#
# @wrapper
# def func1():
#     time.sleep(1)
#     print('chen')
# @wrapper
# def func2():
#     print('shao')
#
# func1()
# func2()

# 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
username = 1
def wrapper(func):
    def inner(*args, **kwargs):
        read_time()
        if username == None:
            login()
        else:
            msg = func(*args, **kwargs)
            return msg
    return inner
tag = 1
def login():
    global username,tag
    while tag < 3:
        name = input('账号').strip()
        pasd = input('密码').strip()
        with open('db.txt', 'r', encoding='utf-8') as f:
            for line in f:
                if name in line:
                    user = line.strip('
').split(':')
                    if name == user[0] and pasd == user[1]:
                        print('登录成功')
                        username = 1
                        tag = 4
                        doc()
                    else:
                       tag += 1

def doc():
    ret = time.time()
    ret = int(ret) + 100
    with open('time.txt','w',errors='utf-8') as f:
        f.write(str(ret))

def read_time():
    global username
    now_time = time.time()
    now_time = int(now_time)
    with open('time.txt','r',encoding='utf-8') as f:

        war_time = f.read()
    if now_time > int(war_time):
        username = None
    else:
        username = 1

@wrapper
def fu():
    pass
@wrapper
def func1():
    time.sleep(1)
    print('chen')
@wrapper
def func2():
    print('shao')
fu()
func1()
func2()


"""
六：编写装饰器，为多个函数加上记录日志的功能：函数一旦运行则按照下述格式记录日志
    函数开始执行的时间  函数名  返回值
    2020-06-18 12:13:38  index  456
    2020-06-18 12:13:39  home  123

    提示：
        统计时间time.strftime('%Y-%m-%d %H:%M:%S')
        函数名func.__name__
"""

姗姗来迟

import time
def wrapper(func):
    def inner(*args,**kwargs):
        t = time.strftime('%Y-%m-%d %H:%M:%S')
        ret = func(*args,**kwargs)
        with open('log.txt','a',encoding='utf-8') as f:
            f.write("%s %s %s
"%(t,func.__name__,ret))
        return ret
    return inner

@wrapper
def fun():
    print('chen')
    return 22

fun()