# Author: 刘佳赐-Isabelle # Email: [email protected] ''' 练习题: 1、整理装饰器的形成过程,背诵装饰器的固定格式 2、编写装饰器,在每次执行被装饰函数之前打印一句’每次执行被装饰函数之前都得先经过这里,这里根据需求添加代码’ 3、编写装饰器,在每次执行被装饰函数之后打印一句’每次执行完被装饰函数之后都得先经过这里,这里根据需求添加代码’ 4、编写装饰器,在每次执行被装饰函数之前让用户输入用户名,密码,给用户三次机会,登录成功之后,才能访问该函数. 5、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,只支持单用户的账号密码,给用户三次机会),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 6、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,可支持多账号密码),要求登录成功一次(给三次机会),后续的函数都无需再输入用户名和密码。 7、给每个函数写一个记录日志的功能, ''' ''' 1、整理装饰器的形成过程,背诵装饰器的固定格式 ''' # def wrapper(f): # def inner(*args, **kwargs): # ret = f(*args, **kwargs) # return ret # return inner ''' 2、编写装饰器,在每次执行被装饰函数之前打印一句’每次执行被装饰函数之前都得先经过这里,这里根据需求添加代码’ ''' # def wrapper2(f): # def inner2(*args, **kwargs): # print('每次执行被装饰函数之前都得先经过这里,这里根据需求添加代码') # ret = f(*args, **kwargs) # return ret # return inner2 ''' 3、编写装饰器,在每次执行被装饰函数之后打印一句’每次执行完被装饰函数之后都得先经过这里,这里根据需求添加代码’ ''' # def wrapper3(f): # def inner(*args, **kwargs): # ret = f(*args, **kwargs) # print('每次执行完被装饰函数之后都得先经过这里,这里根据需求添加代码') # return ret # return inner ''' 4、编写装饰器,在每次执行被装饰函数之前让用户输入用户名,密码,给用户三次机会,登录成功之后,才能访问该函数. ''' # # Method 1 # def wrapper41(f): # def inner(*args, **kwargs): # ''' # Function to check user name and password # :param args: # :param kwargs: # :return: # ''' # userinfo = [] # username_list = [] # with open('jd_userinfo', encoding='utf-8') as file: # for line in file: # username_list.append(line.strip().split('|')[0]) # userinfo.append(line.strip().split('|')) # # username = input('Please input your username:').strip() # # if username in username_list: # password = input('Please input your password:').strip() # for times in range(0, 3): # if [username, password] in userinfo and times < 2: # ret = f(*args, **kwargs) # return ret # elif [username, password] not in userinfo and times < 2: # times += 1 # print('Invalid Password, left %d times!' % (3-times)) # password =input('Please input your password again:').strip() # elif [username, password] not in userinfo and times >= 2: # print('Invalid Password, tried 3 times, your account has been locked!!') # elif username not in username_list: # print('Invalid username!') # return inner # # # Method 2 # def wrapper42(f): # def inner(*args, **kwargs): # times = 0 # tried times # userinfo = [] # username_list = [] # with open('jd_userinfo', encoding='utf-8') as file: # for line in file: # username_list.append(line.strip().split('|')[0]) # userinfo.append(line.strip().split('|')) # # username = input('Please input your username:').strip() # # if username in username_list: # password = input('Please input your password:').strip() # while 1: # if [username, password] in userinfo and times < 2: # ret = f(*args, **kwargs) # return ret # elif [username, password] not in userinfo and times < 2: # times += 1 # print('Invalid Password, left %d times!' % (3-times)) # password =input('Please input your password again:').strip() # elif [username, password] not in userinfo and times >= 2: # print('Invalid Password, tried 3 times, your account has been locked!!') # break # # elif username not in username_list: # print('Invalid username!') # return inner # # @wrapper41 # # @wrapper42 # def f(): # print(111) # # f() ''' 5、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,只支持单用户的账号密码,给用户三次机会), 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 ''' # login_status = { # 'username': None, # 'status': False, # } # # def wrapper(f): # def inner(*args, **kwargs): # ''' # Function to check login status, if not logged in, check user name and password to login; # once logged in, no need to verify status for further functions! # :param args: # :param kwargs: # :return: # ''' # if login_status['status']: # ret = f(*args, **kwargs) # return ret # else: # userinfo = [] # username_list = [] # with open('jd_userinfo', encoding='utf-8') as file: # for line in file: # username_list.append(line.strip().split('|')[0]) # userinfo.append(line.strip().split('|')) # # username = input('Please input your username:').strip() # # if username in username_list: # password = input('Please input your password:').strip() # for times in range(0, 3): # if [username, password] in userinfo and times < 2: # ret = f(*args, **kwargs) # login_status['status'] = True # login_status['username'] = username # return ret # elif [username, password] not in userinfo and times < 2: # times += 1 # print('Invalid Password, left %d times!' % (3-times)) # password =input('Please input your password again:').strip() # elif [username, password] not in userinfo and times >= 2: # print('Invalid Password, tried 3 times, your account has been locked!!') # elif username not in username_list: # print('Invalid username!') # return inner # # @wrapper # def func1(): # print(111) # # @wrapper # def func2(): # print(222) # # @wrapper # def func3(): # print(333) # # func1() # func2() # func3() ''' 6、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,可支持多账号密码), 要求登录成功一次(给三次机会),后续的函数都无需再输入用户名和密码。 ''' # login_status = { # 'TM_username': None, # 'TM_status': False, # 'JD_username': None, # 'JD_status': False, # } # # # def account(Flag): # def wrapper(f): # def inner(*args, **kwargs): # ''' # Function to check login status, if not logged in (available to check multiple accounts), # check user name and password to login; # once logged in, no need to verify status for further functions! # :param args: # :param kwargs: # :return: # ''' # account_book = Flag.lower()+'_userinfo' # account_username = Flag+'_username' # account_status = Flag+'_status' # # if login_status[account_status]: # ret = f(*args, **kwargs) # return ret # else: # userinfo = [] # username_list = [] # # with open(account_book, encoding='utf-8') as file: # for line in file: # username_list.append(line.strip().split('|')[0]) # userinfo.append(line.strip().split('|')) # # username = input('Please input your %s account username:' % Flag).strip() # # if username in username_list: # password = input('Please input your %s account password:' % Flag).strip() # for times in range(0, 3): # if [username, password] in userinfo and times < 2: # login_status[account_status] = True # login_status[account_username] = username # ret = f(*args, **kwargs) # return ret # elif [username, password] not in userinfo and times < 2: # times += 1 # print('Invalid Password, left %d times!' % (3-times)) # password =input('Please input your password again:').strip() # elif [username, password] not in userinfo and times >= 2: # print('Invalid Password, tried 3 times, your account has been locked!!') # elif username not in username_list: # print('Invalid username!') # return inner # return wrapper # # @account('TM') # def func1(): # print(111) # # @account('JD') # def func2(): # print(222) # print(login_status['JD'+'_username']) # # @account('TM') # def func3(): # print(333) # # func1() # func2() # func3() ''' 7、给每个函数写一个记录日志的功能, ''' # import time # struct_time = time.localtime() # # def wrapper(f): # def inner(*args, **kwargs): # ret = f(*args, **kwargs) # with open('diary', mode='a', encoding='utf-8') as file: # file.write('Function {} was conducted at {}'.format(str(f)[10:str(f).index('at')-1], # time.strftime("%Y-%m-%d %H:%M:%S", struct_time))) # return ret # return inner # # @wrapper # def func(): # print(1) # # func() """ 功能要求:每一次调用函数之前,要将函数名称,时间节点记录到log的日志中。 所需模块: import time struct_time = time.localtime() print(time.strftime("%Y-%m-%d %H:%M:%S",struct_time)) 1),启动程序,首页面应该显示成如下格式: 欢迎来到博客园首页 1:请登录 2:请注册 3:文章页面 4:日记页面 5:评论页面 6:收藏页面 7:注销 8:退出程序 2),用户输入选项,3~6选项必须在用户登录成功之后,才能访问成功。 3),用户选择登录,用户名密码从register文件中读取验证,三次机会, 没成功则结束整个程序运行,成功之后,可以选择访问3~6项,访问页面之前, 必须要在log文件中打印日志,日志格式为-->用户:xx 在xx年xx月xx日 执行了 %s函数, 访问页面时,页面内容为:欢迎xx用户访问评论(文章,日记,收藏)页面 4),如果用户没有注册,则可以选择注册,注册成功之后,可以自动完成登录,然后进入首页选择。 5),注销用户是指注销用户的登录状态,使其在访问任何页面时,必须重新登录。 """ # import time # struct_time = time.localtime() # # # login_status = { # 'TM_username': None, # 'TM_status': False, # 'JD_username': None, # 'JD_status': False, # } # # default_page = ''' # 欢迎来到博客园首页 # 1:请登录 # 2:请注册 # 3:文章页面 # 4:日记页面 # 5:评论页面 # 6:收藏页面 # 7:注销 # 8:退出程序 # ''' # def account(Flag='TM'): # def login_check(func): # ''' # Decoration function # :param func: function to be decorated # :return: func # ''' # def inner(*args, **kwargs): # ''' # decoration function # :param args: # :param kwargs: # :return: decorated function # ''' # account_book = Flag.lower()+'_userinfo' # account_username = Flag+'_username' # account_status = Flag+'_status' # account_diary = Flag+'_diary' # # if login_status[account_status]: # ret = func(*args, **kwargs) # # with open(account_diary, mode='a', encoding='utf-8') as file: # file.write('用户:{}在{}执行了{}\n'.format(login_status[account_username], # time.strftime("%Y-%m-%d %H:%M:%S", struct_time), # str(func)[10:str(func).index('at') - 1])) # return ret # else: # print("Please login first!") # # # check user name and password # username = input("Please input your username:").strip() # # # make a list of saved username and corresponding password # # TODO: is this necessary to create a new list? # username_list = [] # list of user name # userinfo_list = [] # list of user name and corresponding password # with open(account_book, encoding="utf-8") as file: # for line in file: # username_list.append(line.strip().split("|")[0]) # TODO:any simpler expression? # userinfo_list.append(line.strip().split("|")) # TODO:any simpler expression? # if username in username_list: # password = input('Please input your password:').strip() # for times in range(0, 3): # if [username, password] in userinfo_list: # login_status[account_username] = username # login_status[account_status] = True # ret = func(*args, **kwargs) # # with open(account_diary, mode='a', encoding='utf-8') as file: # file.write('用户:{}在{}执行了{}\n'.format(login_status[account_username], # time.strftime("%Y-%m-%d %H:%M:%S", struct_time), # str(func)[10:str(func).index('at') - 1])) # return ret # elif [username, password] not in userinfo_list and times < 2: # times += 1 # print('Invalid password, left %d times!' % (3 - times)) # password = input('Please input your password again:') # elif [username, password] not in userinfo_list and times >= 2: # print('Invalid password, failed for three times!! You account has been locked!') # elif username not in username_list: # print("Unregistered username, please register!") # register() # return inner # return login_check # # # @account('JD') # def register(): # global operation # # # check whether the username is available (occupied or not) # username_check = [] # TODO: is this necessary to create a new list? # # with open("jd_userinfo", "r+", encoding="utf-8") as file: # for line in file: # username_check.append(line.strip().split()[0]) # username = input("Please set your username:").strip() # while 1: # if username not in username_check: # password = input("Please set your password:") # file.write("{}|{}\n".format(username, password)) # # login_status['JD'+'_status'] = True # login_status['JD'+'_username'] = username # print(default_page) # # with open('JD' + '_diary', mode='a', encoding='utf-8') as file2: # file2.write('用户:{}在{}执行了{}\n'.format(login_status['JD' + '_username'], # time.strftime("%Y-%m-%d %H:%M:%S", struct_time), # str(register)[10:str(register).index('at') - 1])) # operation = input('Please select your operation(1-8):') # dic[int(operation)]() # # elif username in username_check: # print("Username has been taken, please reset your username!!") # username = input("Please set your username again:").strip() # # @account('JD') # def login(): # print(default_page) # operation = int(input('Please select your operation(1-8):')) # if operation == 1: # print('You have already logged in!!') # operation = int(input('Please select your operation(2-8):')) # else: # dic[operation]() # # # @account('JD') # def page(): # print("欢迎用户%s访问文章页面" % login_status['JD'+'_username']) # operation = int(input('Please select your operation(1-8):')) # dic[operation]() # # @account('JD') # def diary(): # print("欢迎用户%s访问日志页面" % login_status['JD'+'_username']) # with open('JD'+'_diary', encoding='utf-8') as file: # for line in file: # print(line.strip('\n')) # operation = int(input('Please select your operation(1-8):')) # dic[operation]() # # @account('JD') # def comment(): # print("欢迎用户%s访问评论页面" % login_status['JD'+'_username']) # operation = int(input('Please select your operation(1-8):')) # dic[operation]() # # @account('JD') # def save(): # print("欢迎用户%s访问收藏页面" % login_status['JD'+'_username']) # operation = int(input('Please select your operation(1-8):')) # dic[operation]() # # @account('JD') # def logout(): # print("账号已退出!") # # @account('JD') # def quit_operation(): # pass # # dic = { # 1: login, # 2: register, # 3: page, # 4: diary, # 5: comment, # 6: save, # 7: logout, # 8: quit_operation, # } # # # if __name__ == '__main__': # print(default_page) # operation = int(input('Please select your operation(1-8):')) # dic[operation]()
day04-decorator
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