Add application file

app.py

@@ -0,0 +1,80 @@
+import gradio as gr
+from langchain_groq import ChatGroq
+from langchain_community.utilities import ArxivAPIWrapper, WikipediaAPIWrapper
+from langchain_community.tools import ArxivQueryRun, WikipediaQueryRun, DuckDuckGoSearchRun
+from langchain.agents import initialize_agent, AgentType
+from langchain.callbacks import StdOutCallbackHandler
+import os
+
+# Tools Setup (identical to original)
+arxiv_wrapper = ArxivAPIWrapper(top_k_results=1, doc_content_chars_max=200)
+arxiv = ArxivQueryRun(api_wrapper=arxiv_wrapper)
+wiki_wrapper = WikipediaAPIWrapper(top_k_results=1, doc_content_chars_max=200)
+wiki = WikipediaQueryRun(api_wrapper=wiki_wrapper)
+search = DuckDuckGoSearchRun(name="Search")
+
+# Gradio Chat Interface - UPDATED VERSION
+def respond(message, chat_history, api_key):
+    if not api_key:
+        chat_history.append((message, "⚠️ Please enter your Groq API key"))
+        return "", chat_history
+    
+    try:
+        # Initialize agent with error handling
+        llm = ChatGroq(groq_api_key=api_key, model_name="Llama3-8b-8192")
+        tools = [search, arxiv, wiki]
+        
+        agent = initialize_agent(
+            tools, 
+            llm, 
+            agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION,
+            handle_parsing_errors=True
+        )
+        
+        # Using the recommended .invoke() method instead of deprecated .run()
+        callback = StdOutCallbackHandler()
+        response = agent.invoke(
+            {"input": message},
+            {"callbacks": [callback]}
+        )
+        
+        chat_history.append((message, response["output"]))
+        
+    except Exception as e:
+        error_msg = f"❌ Error: {str(e)}"
+        if "API key" in str(e):
+            error_msg = "🔑 Invalid or missing API key"
+        chat_history.append((message, error_msg))
+    
+    return "", chat_history
+
+# UI Layout (unchanged)
+with gr.Blocks(title="🔎 LangChain - Chat with Search") as demo:
+    gr.Markdown("""
+    ## 🔎 LangChain - Chat with Search
+    Chatbot that can search the web, arXiv, and Wikipedia.
+    """)
+    
+    with gr.Row():
+        with gr.Column(scale=1):
+            api_key = gr.Textbox(
+                label="Groq API Key", 
+                type="password",
+                placeholder="Enter your API key"
+            )
+        with gr.Column(scale=4):
+            chatbot = gr.Chatbot(height=500)
+            msg = gr.Textbox(
+                placeholder="What is machine learning?",
+                label="Your Question"
+            )
+            clear = gr.ClearButton([msg, chatbot])
+    
+    msg.submit(
+        respond, 
+        [msg, chatbot, api_key], 
+        [msg, chatbot]
+    )
+
+if __name__ == "__main__":
+    demo.launch(debug=True)  # Added debug mode for development