fixing

app.py

@@ -10,6 +10,8 @@ import json
 import tempfile
 import urllib.parse
 from pathlib import Path
+from duckduckgo_search import DDGS
+
 
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
@@ -29,6 +31,21 @@ class HfApiModel:
         outputs = self.pipe(prompt, max_new_tokens=512, do_sample=True)
         return outputs[0]["generated_text"]
 
+class DuckDuckGoSearchTool:
+    name = "duckduckgo_search"
+    description = "Use DuckDuckGo to search the web."
+
+    def __call__(self, query: str) -> str:
+        try:
+            results = []
+            with DDGS() as ddgs:
+                for r in ddgs.text(query, max_results=3):
+                    results.append(f"Title: {r['title']}\nURL: {r['href']}\nSnippet: {r['body']}\n---")
+            return "\n".join(results) if results else "No results found."
+        except Exception as e:
+            return f"Error using DuckDuckGoSearchTool: {e}"
+
+
 # --- Custom Tools ---
 class SerperSearchTool:
     """Enhanced search tool using Serper API for more reliable results"""
@@ -44,7 +61,6 @@ class SerperSearchTool:
     def __call__(self, query: str) -> str:
         """Search the web and return formatted results"""
         if not self.api_key:
-            # Fallback to basic search if no Serper API key
             return f"Search query: {query} - API key not available"
         
         try:
@@ -64,22 +80,20 @@ class SerperSearchTool:
             data = response.json()
             results = []
             
-            # Process organic results
             if 'organic' in data:
-                for item in data['organic'][:3]:  # Top 3 results
+                for item in data['organic'][:3]:
                     results.append(f"Title: {item.get('title', 'N/A')}")
                     results.append(f"Content: {item.get('snippet', 'N/A')}")
                     results.append(f"URL: {item.get('link', 'N/A')}")
                     results.append("---")
             
-            # Add answer box if available
             if 'answerBox' in data:
                 answer = data['answerBox']
                 results.insert(0, f"Answer: {answer.get('answer', answer.get('snippet', 'N/A'))}")
                 results.insert(1, "---")
             
             return "\n".join(results) if results else f"No results found for: {query}"
-            
+        
         except Exception as e:
             print(f"Serper search error: {e}")
             return f"Search error for '{query}': {str(e)}"