Update tools/unit_conversion.py

tools/unit_conversion.py

@@ -1,26 +1,33 @@
-class UnitConverter:
-    def __init__(self):
-        self.conversion_factors = {
-            ("miles", "kilometers"): 1.60934,
-            ("kilometers", "miles"): 0.621371,
-            ("pounds", "kilograms"): 0.453592,
-            ("kilograms", "pounds"): 2.20462,
-            ("celsius", "fahrenheit"): lambda c: (c * 9/5) + 32,
-            ("fahrenheit", "celsius"): lambda f: (f - 32) * 5/9
-        }
+from smolagents import tool
 
-    def convert(self, value, from_unit, to_unit):
-        key = (from_unit.lower(), to_unit.lower())
+@tool
+def unit_conversion(value: float, from_unit: str, to_unit: str) -> str:
+    """A tool for converting units like distance, weight, and temperature.
+    
+    Args:
+        value: The numerical value to convert.
+        from_unit: The unit of the input value (e.g., 'miles', 'kilograms', 'celsius').
+        to_unit: The desired unit (e.g., 'kilometers', 'pounds', 'fahrenheit').
+    
+    Returns:
+        A string describing the converted value.
+    """
 
-        if key in self.conversion_factors:
-            conversion = self.conversion_factors[key]
-            result = conversion(value) if callable(conversion) else value * conversion
-            return f"{value} {from_unit} is {result:.2f} {to_unit}."
-        else:
-            return "Sorry, conversion not supported."
+    conversion_factors = {
+        ("miles", "kilometers"): 1.60934,
+        ("kilometers", "miles"): 0.621371,
+        ("kilograms", "pounds"): 2.20462,
+        ("pounds", "kilograms"): 0.453592,
+    }
 
-# Example usage
-if __name__ == "__main__":
-    converter = UnitConverter()
-    print(converter.convert(5, "miles", "kilometers"))  # 5 miles is 8.05 kilometers.
-    print(converter.convert(100, "celsius", "fahrenheit"))  # 100°C is 212°F.
+    # Temperature conversions
+    if from_unit == "celsius" and to_unit == "fahrenheit":
+        result = (value * 9/5) + 32
+    elif from_unit == "fahrenheit" and to_unit == "celsius":
+        result = (value - 32) * 5/9
+    elif (from_unit, to_unit) in conversion_factors:
+        result = value * conversion_factors[(from_unit, to_unit)]
+    else:
+        return f"Sorry, conversion from {from_unit} to {to_unit} is not supported."
+
+    return f"{value} {from_unit} is {round(result, 2)} {to_unit}."