Update app.py

app.py

@@ -7,15 +7,13 @@ from langchain.tools import BaseTool
 from langchain_community.tools import DuckDuckGoSearchRun
 from langchain_openai import OpenAI
 from typing import Optional, Type
+from pydantic import Field
 
 class SearchTool(BaseTool):
     name: str = "Search"
     description: str = "Search the internet for information"
     return_direct: bool = False
-    
-    def __init__(self):
-        super().__init__()
-        self.search = DuckDuckGoSearchRun()
+    search: DuckDuckGoSearchRun = Field(default_factory=DuckDuckGoSearchRun)
     
     def _run(self, query: str) -> str:
         """Execute the search tool"""
@@ -25,6 +23,8 @@ class SearchTool(BaseTool):
         """Async implementation"""
         raise NotImplementedError("Async not implemented")
 
+# Rest of the code remains the same...
+
 def setup_api_keys():
     """Setup API keys from Hugging Face Spaces secrets"""
     try: