save project

diy2.py

+i=3
 username = 'python'
 username = 'python'
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    a=input('输入账号:')
-    if a != username:
-        print("用户名不正确:")
-    else:
-        b=input('输入密码:')
-        if b==userpassword:
-            print("登陆成功")
-            break    
+    if i>0:
+        i-=1
+        a=input('输入账号:')
+        if a != username:
+            print("用户名不正确:")
         else:
         else:
-            print('密码错误')
+            b=input('输入密码:')
+            if b==userpassword:
+                print("登陆成功")
+                break    
+            else:
+                print('密码错误')
+    else:
+        print('locked!')
+        exit()
 print("欢迎来到贝尔编程!:")
 print("欢迎来到贝尔编程!:")
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