auto save

444.py

+i = 3
+username=""
+userpassword="987654321"
+while True:
+    if i>0:
+        name = input("请输入用户名：")
+        password = input("请输入密码:") 
+        i -=1
+        if name == username
+        print("登录成功")
+        break
+    if name != username:
+        print("用户名错误")
+        print("温馨提示：您")
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