fix: add ddgs dependency for search tool

app.py

@@ -12,7 +12,7 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 # ----- THIS IS WERE YOU CAN BUILD WHAT YOU WANT ------
 from smolagents import CodeAgent, LiteLLMModel, DuckDuckGoSearchTool
 import os
-import spaces  # 💡 1. 引入 Hugging Face 的 GPU 空間套件
+import spaces 
 
 class BasicAgent:
     def __init__(self):
@@ -25,7 +25,6 @@ class BasicAgent:
         self.search_tool = DuckDuckGoSearchTool()
         self.agent = CodeAgent(tools=[self.search_tool], model=self.model)
 
-    # 💡 2. 在實際執行的函式上方加上這個裝飾器，滿足 Zero GPU 的啟動檢查
     @spaces.GPU
     def __call__(self, question: str) -> str:
         try:

requirements.txt

@@ -1,3 +1,4 @@
 gradio
 requests
-smolagents[litellm]
+smolagents[litellm]
+ddgs