Update tools.py

tools.py

@@ -9,7 +9,7 @@ from state import AgentState
 from langchain.schema import HumanMessage 
 import regex as re
 import time
-from duckduckgo_search import ddg
+from duckduckgo_search import DDGS
 
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
@@ -50,7 +50,7 @@ def web_search_tool(state: AgentState) -> AgentState:
     if not query:
         return {}  # nothing to do
 
-    
+    ddg = DDGS()
     max_retries = 5
     result_text = ""