1. Number of password entries 2, multi-level menu

1. Number of account password input

Condition: 1, enter user password

2. Display welcome information after successful authentication

3, the wrong three times after the lock

User= "Pengchun"

Password= "Pcwangjixuan"

f = open (' User.log ', ' R ')

Lock_file = F.read ()

F.close ()

Count = 0

For I in range (3):

User1=input ("Please input your name:")

Password1 = input ("Please input your passwor:")

For j in Range (1):

if Lock_file = = User1:

Print ("The account is locked")

Exit ()

Else

Continue

if user = = User1 and Password = = Password1:

Print ("Verification succeeded")

Break

Else

If i==2:

Print ("You have tried too many times and the system automatically exits")

Else

Print ("Login failed, please re-enter")

Count +=1

if Count = = 3 and User1! = "Pengchun":

Print ("You are using more than 3 users and the system is about to be locked")

f = open ("User.log", "W")

F.write ("%s"%user1)

F.close ()

2. Multi-level menu

1. Number of password entries 2, multi-level menu