save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i=3
 while True:
 while True:
+    if i>0:
         name = input("请输入用户名:")
         name = input("请输入用户名:")
+        i=i-1
+        if name == username:
             password = input("请输入密码:")
             password = input("请输入密码:")
-    if name == username and password == userpassword:
+            if password==userpassword:
                 print("登录成功!")
                 print("登录成功!")
                 break 
                 break 
-    if name != username:
-        print("用户名错误!")
-        continue
-    if password != userpassword:
+            else:
                 print("密码错误!")
                 print("密码错误!")
-    print("用户名和密码错误!请重新输入")
+        else:
+            print("用户名错误!")
+    else:
+        print("你的次数用完了。")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
+
+     
+