Update app.py

app.py

@@ -16,6 +16,7 @@ import tempfile
 import ast
 import pytesseract
 from PIL import Image
+from langchain_core.tools import tool
 # Or using AudioTranscriptTool.
 
 
@@ -28,12 +29,14 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
 ############### tool
 
+@tool
 def divide(a: int|float, b: int|float) -> float:
     """Divide a and b."""
     if b == 0:
         return "Cannot divide by zero."
     return a / b
     
+@tool    
 def multiply(a: int|float, b: int|float) -> float:
     """Multiply a and b."""
     return a * b
@@ -43,7 +46,8 @@ def add(a: int|float, b: int|float) -> float:
 def subtract(a: int|float, b: int|float) -> float:
     """Subtract a with b."""
     return a - b
-
+    
+@tool
 def pdf_loader_tool(file_url: str) -> str:
     """Load and extract text from a PDF file downloaded from given file_url."""
     try:
@@ -62,6 +66,7 @@ def pdf_loader_tool(file_url: str) -> str:
     except Exception as e:
         return f"Reading failed: {str(e)}"
 
+@tool
 def docx_loader_tool(file_url: str) -> str:
     """Load and extract text from a docx file downloaded from given file_url."""
     try:
@@ -79,7 +84,8 @@ def docx_loader_tool(file_url: str) -> str:
             
     except Exception as e:
         return f"Reading failed: {str(e)}"
-        
+
+@tool
 def excel_loader_tool(file_url: str) -> str:
     """Load and extract text from an Excel file downloaded from given file_url."""
     try:
@@ -96,7 +102,8 @@ def excel_loader_tool(file_url: str) -> str:
             return output
     except Exception as e:
         return f"Reading failed: {str(e)}"
-        
+
+@tool
 def txt_loader_tool(file_url: str) -> str:
     """Load and extract text from a txt file downloaded from given file_url."""
     try:
@@ -114,7 +121,8 @@ def txt_loader_tool(file_url: str) -> str:
             
     except Exception as e:
         return f"Reading failed: {str(e)}"
-    
+        
+@tool    
 def read_image_text(file_URL: str) -> str:
     """Extract text from image downloaded from given file_URL using OCR."""
     try:
@@ -132,12 +140,14 @@ def read_image_text(file_URL: str) -> str:
     except Exception as e:
         return f"Reading failed: {str(e)}"
         
+@tool        
 def youtube_transcript_tool(url: str) -> str:
     """Load transcript from a YouTube video URL."""
     loader = YoutubeLoader.from_youtube_url(url, add_video_info=True)
     docs = loader.load()
     return "\n".join([f"Title: {doc.metadata.get('title', 'Unknown')}\nTranscript: {doc.page_content}" for doc in docs])
-    
+
+@tool    
 def analyze_python_code(file_url: str) -> str:
     """Downloads an python code from a URL, then analyze it and summarize its structure."""
     try:
@@ -157,7 +167,8 @@ def analyze_python_code(file_url: str) -> str:
 
     except Exception as e:
         return f"Reading failed: {str(e)}"
-        
+
+@tool
 def transcribe_audio(file_url: str) -> str:
     """Downloads an audio file from a URL into a temporary file and transcribes it using SpeechRecognition."""
     try:
@@ -177,7 +188,8 @@ def transcribe_audio(file_url: str) -> str:
 
     except Exception as e:
         return f"Transcription failed: {str(e)}"
-        
+
+@tool        
 def search_wikipedia(query: str) -> str:
     """Search English Wikipedia for the given query and return a summary within 3 sentences."""
     try: