Create PythonCalcTool.py

tools/PythonCalcTool.py

@@ -0,0 +1,28 @@
+from smolagents import Tool
+
+class PythonCalcTool(Tool):
+    name = "python_calc"
+    description = (
+        "Executes Python code to compute numeric answers for calculation problems. "
+        "Safe, GAIA-friendly tool to solve math, physics, or distance/time problems."
+    )
+    inputs = {
+        "code": {"type": "string", "description": "Python code that sets a variable 'result' with the answer."}
+    }
+    output_type = "string"
+
+    def forward(self, code: str) -> str:
+        """
+        Executes the code safely and returns the result as a string.
+        Code must set a variable 'result' which is returned.
+        """
+        try:
+            local_vars = {}
+            exec(code, {}, local_vars)
+            # The agent should always set 'result'
+            answer = local_vars.get("result", None)
+            if answer is None:
+                return "NA"
+            return str(answer)
+        except Exception as e:
+            return "NA"