Python: Business card management system (problems after adding login function, ask for advice)

I defined a simple business card management system as a function.

2 layers.

a login interface;

A business card management system using the interface;

The logic is: Login success = "Jump into the business card system using the interface, at the same time, jump out of the login interface, give welcome to use, the program ends."

At this point: from the business card system using the interface to jump out, should be logged out, the result, that is to say, the first layer will jump out, the second layer now

1 defMingpian ():2Name = []3NAME_FL =04      whileNAME_FL = =0:5         Print("="*50)6         Print("Welcome to the card management system V1.0")7         Print("1: Add a business card")8         Print("2: Modify a business card")9         Print("3: Delete a business card")Ten         Print("4: Query a business card") One         Print("5: Exit") A         Print("="*50) -admin = Int (input ("Please enter the function number:")) -  the         ifadmin = = 1: -              whileTrue: -New_name = input ("Please enter your name:") -                 ifNew_name = ="return": +                      Break - name.append (new_name) +                 Print("=======> added successfully! ") A                 Print("=======> has now been added with the name:%s"%(name)) at                 Print("=======> return Menu Please enter: Return") -         elifadmin = = 2: -              whileTrue: -Al_name = input ("Please enter the name you want to change:") -                 ifAl_name = ="return": -                      Break in                 ifAl_nameinchName: -Als_name = input ("Please enter a new name:") to Name.remove (al_name) + name.append (als_name) -                     Print("=======> 's current name is:%s"%(name)) the                 Else: *                     Print("The name you entered does not exist, please re-enter! ") $                 Print("=======> return Menu Please enter: Return")Panax Notoginseng         elifadmin = = 3: -              whileTrue: theDel_name = input ("Please enter the name you want to delete:") +                 ifDel_name = ="return": A                      Break the Name.remove (del_name) +                 Print("=======> Delete Success! ") -                 Print("=======> currently has the remaining name:%s"%(name)) $                 Print("=======> return Menu Please enter: Return") $         elifadmin = = 4: -              whileTrue: -Look_name = input ("Please enter the name you want to query:") the                 ifLook_name = ="return": -                      BreakWuyi                 Else: the                     ifLook_nameinchName: -                         Print("the name you want to query exists! ") Wu                     Else: -                         Print("no such person! ") About                 Print("=======> return Menu Please enter: Return") $         elifadmin = = 5: -NAME_FL =1 -         Else: -             Print("your input is wrong, please enter it again! ") A  +         #===== Login Registration theAD = {} -NAME_FL =0 $  whileNAME_FL = =0: the     Print("="*50) the     Print("Welcome to use card management system V1.0") the     Print("1. Login") the     Print("2. Registration") -     Print("3. Exit") in     Print("="*50) the  theadmin_1 = Int (input ("Please enter the function number:")) About  the     ifAdmin_1 = = 1: the          whileTrue: theadmin = input ("Please enter your login account:") +passwd = input ("Please enter your login password:") -              forAdmins,passwdsinchAd.items (): the                 ifadmin = = Admins andpasswd = =Passwds:Bayi                     Print("Login Successful! ") the Mingpian () the  -                 Else: -                     Print("incorrect account or password! Please sign in again! ") the     elifAdmin_1 = = 2: the          whileTrue: theNew_zh = input ("Please enter your registered account:") the             ifNew_zhinchAd.keys (): -                 Print("account already exists! Please enter the new! ") the             Else: theNEW_PASSWD = input ("Please enter the registration password:") theAd[new_zh] =new_passwd94                 Print("Registration Successful! ") the                  Break the     elifAdmin_1 ==3: the         Print("thanks for using the card management system V1.0, Goodbye! ")98     Else: About          Print("input Error, please re-enter! ")

Can't jump out of it ....

Python: Business card management system (problems after adding login function, ask for advice)