Update app.py

app.py

@@ -76,19 +76,27 @@ predictor = load_model()
 initialize_html_template()
 
 @app.route("/")
+
 def index():
     # 获取当前业务日
     current_business_date, _ = get_business_info()
-    # 仅当业务日变化时，才执行 main_task
-    #if Config["LAST_INFERENCED_BUSINESS_DATE"] != current_business_date:
+    
+    # 容错处理：检查配置键是否存在，不存在则执行主任务
+    # 同时处理键存在但值为None的情况（首次运行）
+    if ("LAST_INFERENCED_BUSINESS_DATE" not in Config 
+        or Config["LAST_INFERENCED_BUSINESS_DATE"] != current_business_date):
         main_task(predictor)
     
     # 读取并返回 HTML
-    with open(Config["HTML_PATH"], 'r', encoding='utf-8') as f:
-        html_content = f.read()
-    return render_template_string(html_content)
-
-
+    try:
+        with open(Config["HTML_PATH"], 'r', encoding='utf-8') as f:
+            html_content = f.read()
+        return render_template_string(html_content)
+    except FileNotFoundError:
+        # 处理HTML文件不存在的情况
+        return "预测页面生成中，请稍后刷新", 202
+    except Exception as e:
+        return f"页面加载错误：{str(e)}", 500
 
 
 @app.route("/prediction_chart.png")