Update app.py

app.py

@@ -11,7 +11,26 @@ from tools.web_search import DuckDuckGoSearchTool
 @tool
 def DuckDuckGoSearchTool (web_search: str) -> str:
     """"A tool Performs a duckduckgo web search based on your query (think a Google search) then returns the top search results."""
+inputs = {'query': {'type': 'string', 'description': 'The search query to perform.'}}
+    output_type = "string"
 
+    def __init__(self, max_results=10, **kwargs):
+        super().__init__()
+        self.max_results = max_results
+        try:
+            from duckduckgo_search import DDGS
+        except ImportError as e:
+            raise ImportError(
+                "You must install package `duckduckgo_search` to run this tool: for instance run `pip install duckduckgo-search`."
+            ) from e
+        self.ddgs = DDGS(**kwargs)
+
+    def forward(self, query: str) -> str:
+        results = self.ddgs.text(query, max_results=self.max_results)
+        if len(results) == 0:
+            raise Exception("No results found! Try a less restrictive/shorter query.")
+        postprocessed_results = [f"[{result['title']}]({result['href']})\n{result['body']}" for result in results]
+        return "## Search Results\n\n" + "\n\n".join(postprocessed_results)
        
 @tool 
 def get_current_time_in_timezone(timezone: str) -> str: