Small case: Writing a login interface

1. Enter User name Login

2. Display welcome information after successful authentication

3, password error three times after locking

1 #Author BIGD2 ImportOs,sys3 4I=05  whileI<3:6Username = input ("Enter your name:")7 8     #Check if the user exists9Locked_lines = open ("Locked.txt","r+") # #对文件进行读写Ten      forLocked_lineinchLocked_lines: One         ifUsername = = Locked_line.strip ('\ n'): # #取得姓名 A             Print("You are locked,fuck off") - sys.exit (0) -  the  -Lines = open ("User-passwd.txt","R") # #对文件只读 -      forLineinchlines: -[NAME,PASSWD] = Line.strip ('\ n'). Split (' ', 1) # #取得姓名和密码. Strip remove the symbols on both sides, spilt separate +  -         ifUsername = =Name: +             Print("hello,%s"%(name)) A  atj=0 -              whileJ<3: -                 Print(passwd) -PD = input ("Enter your Passwrod:") -                 ifPD = =passwd: -                     Print("Welcome%s"%(name)) in exit (0) -                 Else: to                     Print("Wrong!you has%d times"% (2-j)) +  -J + = 1 the             Else: *Locked_lines.write (username +'\ n') $                 Print("locked")Panax Notoginseng exit (0) -  the         Else: +             Pass A  the     Else: +         Print("You have %d times"% (2-i)) -i + = 1 $ Else: $     Print("user is not exist.bye!")

Small case: Writing a login interface