Create tools.py

tools.py

@@ -0,0 +1,28 @@
+from langchain_core.tools import tool
+from langchain_community.tools import DuckDuckGoSearchRun
+from langchain_tavily import TavilySearch
+import asyncio
+import os
+#from dotenv import load_dotenv
+#load_dotenv()
+
+os.environ["TAVILY_API_KEY"] = os.getenv("TAVILY_API_KEY")
+
+@tool
+async def websearch(query: str) -> str:
+    """
+    Perform a web search using DuckDuckGo.
+
+    Args:
+        query (str): The search query string.
+
+    Returns:
+        str: The result of the web search as a string. 
+        If an exception occurs, returns a fallback string indicating no results were found.
+    """
+    search_engine = DuckDuckGoSearchRun()
+    try:    
+        response = await search_engine.ainvoke(query)
+        return response
+    except:
+        return f"No results found on the web for this query: {query}."