update tools.py

tools.py

@@ -0,0 +1,28 @@
+
+
+from langchain_community.tools import WikipediaQueryRun, ArxivQueryRun
+from langchain_community.utilities import WikipediaAPIWrapper,ArxivAPIWrapper
+from langchain_community.tools.tavily_search import TavilySearchResults
+from langchain_core.tools import tool
+from datetime import datetime
+
+def wikipedia_tool() -> WikipediaQueryRun:
+    """best search for biography, facts and history"""
+    return WikipediaQueryRun(
+        api_wrapper=WikipediaAPIWrapper(doc_content_chars_max= 4000)
+    )
+
+def tavily_tool() -> TavilySearchResults:
+    """web search for recents events and facts"""
+    return TavilySearchResults(max_results=5)
+
+def arxiv_tool() -> ArxivQueryRun:
+    """returns scientific and research papers"""
+    return ArxivQueryRun(
+        api_wrapper=ArxivAPIWrapper(top_k_results= 3, doc_content_chars_max = 4000)
+    )
+
+@tool
+def get_current_year() -> str:
+    """returns the current year"""
+    return str(datetime.now().year)