Update app.py

app.py

@@ -7,6 +7,7 @@ from deep_translator import GoogleTranslator
 
 def translate_document(file, target_language, target_country, api_key):
     log_messages = []
+    output_path = None  # 初始化 output_path
 
     try:
         log_messages.append("Starting translation process...")
@@ -61,6 +62,10 @@ def translate_document(file, target_language, target_country, api_key):
             prs.save(output_path)
             log_messages.append(f"Saved translated presentation as {output_path}.")
 
+        else:
+            log_messages.append("Unsupported file type. Please upload a .docx or .pptx file.")
+            return None, "\n".join(log_messages)  # 返回 None 如果文件類型不支持
+
         return output_path, "\n".join(log_messages)  # 返回文件路徑和日誌信息
 
     except Exception as e: