save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "python"
 userpassword = "python"
+i=5
 while True:
 while True:
+    if i>0:
         name = input("请输入用户名:")
         name = input("请输入用户名:")
         password = input("请输入密码:")
         password = input("请输入密码:")
+        i-=1
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
+            exit()
         elif name != userpassword:
         elif name != userpassword:
-        print("用户名错误")
+            print("用户")
         else :
         else :
             print("密码错误")                                      
             print("密码错误")                                      
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")