Update app.py

app.py

@@ -252,12 +252,15 @@ def classify_email(json_input):
 
 # ===================== 核心处理函数（模拟邮件分析） =====================
 def classify_email(sender: str, subject: str, body: str) -> tuple[str, str]:
+    if sender.strip() ==  "" or subject.strip() == "" or body.strip() == "" :
+        return return "true", "sender、subject、subject为空"
+        
     email = {
         "sender": sender,
         "subject": subject,
         "body": body
     }
-
+    
     result = compiled_graph.invoke({
         "email": email,
         "is_spam": None,
@@ -280,14 +283,14 @@ with gr.Blocks(title="邮件分析表单", theme=gr.themes.Soft()) as demo:
         with gr.Column(scale=1):
             sender_input = gr.Textbox(
                 label="1. 发件人邮箱地址",
-                placeholder="例如：john.smith@gmail.com",
+                placeholder="john.smith@gmail.com",
                 lines=1,
                 max_lines=1
             )
         with gr.Column(scale=2):
             subject_input = gr.Textbox(
                 label="2. 邮件主题",
-                placeholder="例如：预约会议 / 新年祝福",
+                placeholder="预约会议",
                 lines=1,
                 max_lines=1
             )
@@ -295,7 +298,7 @@ with gr.Blocks(title="邮件分析表单", theme=gr.themes.Soft()) as demo:
     # 第三个文本框：多行输入（邮件内容）
     content_input = gr.Textbox(
         label="3. 邮件内容",
-        placeholder="例如：我想预约下周二的咨询会议 / 感谢2025年的辛苦付出",
+        placeholder="我想预约下周二的咨询会议",
         lines=5,
         max_lines=10
     )