save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i=3
 while True:
 while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
+    if i>0:
+        name = input("请输入用户名")
+        password = input("请输入密码::")
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
         elif name!=username:
         elif name!=username:
-        print('错误')
-        continue
+            input('错误,请输入用户名')
+            i-=1            
         elif password != userpassword:
         elif password != userpassword:
-        print('错误')
-        continue
+            input('错误,请输入密码:')
+            i-=1
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file