Update app.py

app.py

@@ -134,11 +134,20 @@ class DocumentQATool(BaseTool):
 
 class PythonExecutionTool(BaseTool):
     name: str = "python_execution"
-    description: "Executes Python code for complex calculations, data manipulation, or logical operations. Always assign the final result to a variable named '_result_value'."
+    # Option 1: Single line string (preferred for brevity)
+    description: str = "Executes Python code for complex calculations, data manipulation, or logical operations. Always assign the final result to a variable named '_result_value'."
+    
+    # Option 2: Multi-line string using triple quotes (also valid)
+    # description: str = """Executes Python code for complex calculations,
+    # data manipulation, or logical operations. Always assign the final result
+    # to a variable named '_result_value'."""
+
     def _run(self, code: str) -> str:
         print(f"DEBUG: Executing python_execution with code: {code}")
         try:
             local_vars = {}
+            # It's generally unsafe to use `exec` with arbitrary user input due to security risks.
+            # For a real application, consider a sandboxed environment or a more restricted approach.
             exec(code, globals(), local_vars)
             if '_result_value' in local_vars:
                 return str(local_vars['_result_value'])
@@ -147,7 +156,7 @@ class PythonExecutionTool(BaseTool):
             return f"[Python Error] {str(e)}"
     async def _arun(self, query: str) -> str:
         raise NotImplementedError("Asynchronous execution not supported for now.")
-
+        
 class VideoTranscriptionTool(BaseTool):
     name: str = "transcript_video"
     description: str = "Transcribes video content from a given YouTube URL or video ID."