基本上我正在开发一个程序，它将登录详细信息存储到字典中，并允许您登录并调用logged（）函数（如果您的输入与附加的登录详细信息匹配）。但是，我的第二个菜单似乎存在问题，这是一个logging（）函数，它似乎无法处理任何输入，而while循环使它保持正常运行，它会跳回到请求你的再次登录详情（登录详细信息仍然有效）。当在记录的（）菜单上输入空输入时，它应该说＆＃34;这不是一个有效的选项，请再试一次。＆＃34;，并且任何预期的输入应该调用该功能，但他们仍然跳回到询问再次登录详情。这些while循环对我来说有点太混乱，并尝试将validintro变量切换为True或False。帮助将不胜感激。
vault = {}
def menu():
mode = input("""Hello {}, below are the modes that you can choose from:\n
##########################################################################
a) Login with username and password
b) Register as a new user
To select a mode, enter the corresponding letter of the mode below
##########################################################################\n
> """.format(name)).strip()
return mode
def login():
if len(vault) > 0 : #user has to append usernames and passwords before it asks for login details
print("Welcome to the login console")
while True:
username = input ("Enter Username: ")
if username == "":
print("User Name Not entered, try again!")
continue
password = input ("Enter Password: ")
if password == "":
print("Password Not entered, try again!")
continue
try:
if vault[username] == password:
print("Username matches!")
print("Password matches!")
logged() #jumps to logged function and tells the user they are logged on
except KeyError: #the except keyerror recognises the existence of the username and password in the list
print("The entered username or password is not found!")
else:
print("You have no usernames and passwords stored!")
def register(): #example where the username is appended. Same applies for the password
print("Please create a username and password into the password vault.\n")
while True:
validname = True
while validname:
username = input("Please enter a username you would like to add to the password vault. NOTE: Your username must be at least 3 characters long: ").strip().lower()
if not username.isalnum():
print("Your username cannot be null, contain spaces or contain symbols \n")
elif len(username) < 3:
print("Your username must be at least 3 characters long \n")
elif len(username) > 30:
print("Your username cannot be over 30 characters \n")
else:
validname = False
validpass = True
while validpass:
password = input("Please enter a password you would like to add to the password vault. NOTE: Your password must be at least 8 characters long: ").strip().lower()
if not password.isalnum():
print("Your password cannot be null, contain spaces or contain symbols \n")
elif len(password) < 8:
print("Your password must be at least 8 characters long \n")
elif len(password) > 20:
print("Your password cannot be over 20 characters long \n")
else:
validpass = False #The validpass has to be True to stay in the function, otherwise if it is false, it will execute another action, in this case the password is appended.
vault[username] = password
validinput = True
while validinput:
exit = input("\nEnter 'end' to exit or any key to continue to add more username and passwords:\n> ")
if exit in ["end", "End", "END"]:
return
else:
validinput = False
register()
return register
#LOGGED ONTO THE PASSWORD AND WEBSITE APP ADDING CONSOLE----------------------------------------------------------------------------------
def logged():
print("You are logged in!\n")
modea = input("""Below are the options you can choose:
##########################################################################\n
1) Call test1 function
2) Call test2 function
3) Exit
##########################################################################\n
> """).strip()
return modea
#Main routine
print("Welcome to the password vault program")
print("In this program you will be able to store your usernames and passwords in password vaults and view them later on.\n")
validintro = False
while not validintro:
name = input("Hello user, what is your name?: ")
if len(name) < 1:
print("Please enter a name: ")
elif len(name) > 30:
print("Please enter a name no more than 30 characters: ")
else:
validintro = True
print("Welcome to the password vault program {}.".format(name))
#The main program to run in a while loop for the program to keep on going back to the menu part of the program for more input till the user wants the program to stop
validintro = False
while not validintro:
chosen_option = menu() #a custom variable is created that puts the menu function into the while loop
validintro = False
if chosen_option in ["a", "A"]:
login()
elif chosen_option in ["b", "B"]:
register()
else:
print("""That was not a valid option, please try again:\n """)
validintro = False
validintro = False
while not validintro:
option = logged()
print(option)
if option == "1":
test1()
elif option == "2":
test2()
elif option == "3":
break
else:
print("That was not a valid option, please try again: ")
validintro = False
print("Goodbye")
答案 0 :(得分：1)
您的logged（）函数中的循环问题是它丢失了！记录的功能只打印菜单并读取输入。它没有做任何其他事情。你需要添加这样的东西。
def logged():
print("You are logged in!\n")
keeplooping = True
while keeplooping:
modea = input("""Below are the options you can choose:
##########################################################################
1) Call test1 function
2) Call test2 function
3) Exit
##########################################################################
> """).strip()
if modea == "1":
print("Run Test 1\n")
elif modea == "2":
print("Run Test 2\n")
elif modea == "3":
keeplooping = False
else:
print("That was not a valid option, please try again\n")
return modea