auto save

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i=3
 while True:
 while True:
-    name = input("请输入用户名:")
-    if name != username:
-        print("用户名错误，请重新输入！")
-        continue
-    password = input("请输入密码:")
-    if password != userpassword:
-        print("密码错误，请重新输入！")
-        continue
-    break
+    if i != 0:
+        name = input("请输入用户名:")
+        if name != username:
+            print("用户名错误，请重新输入！")
+            i-=1
+            continue
+        password = input("请输入密码:")
+        if password != userpassword:
+            print("密码错误，请重新输入！")
+            i-=1
+            continue
+        break
+    else:
+        print("账号已锁定！")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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