auto save

diy.py

+username = "111"
+userpassword = "222"
+i = 3
+while True:
+    if i>0:
+        name = input("请输入账号:")
+        if name != username:
+            print("账号输入错误")
+            i -= 1
+            print("当前还剩余"+str(i)+"次")
+            continue
+        password = input("请输入密码：")
+        if name == username and password == userpassword:
+            print("账号密码正确")
+            break
+        if password != userpassword:
+            print("密码输入错误")
+            i -= 1
+            print("当前还剩余"+str(i)+"次")
+            continue
+    else:
+        print("错误次数超过限制，账号已锁定")
+        exit()
+print("登录成功!")
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