Update app.py

Dev: distance calculator tool

app.py

@@ -18,6 +18,29 @@ def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return
     """
     return "What magic will you build ?"
 
+@tool
+def get_distance_between_two_locations_in_km(location1_str:str, location2_str:str)-> float: #it's import to specify the return type
+    #Keep this format for the description / args / args description but feel free to modify the tool
+    """
+    Calculate the distance in kilometers between two locations given as strings.
+
+    Args:
+        location1_str (str): Name or address of the first location.
+        location2_str (str): Name or address of the second location.
+
+    Returns:
+        float: Distance in kilometers.
+    """
+    geolocator = Photon(user_agent="geoapiExercises")
+    loc1 = geolocator.geocode(location1_str)
+    loc2 = geolocator.geocode(location2_str)
+    if not loc1 or not loc2:
+        #raise ValueError("Could not geocode one or both locations.")
+        return f"Could not geocode one or both locations. : {str(e)}"
+    coords_1 = (loc1.latitude, loc1.longitude)
+    coords_2 = (loc2.latitude, loc2.longitude)
+    return f"The distance between {location1_str} and {location2_str} is: {geodesic(coords_1, coords_2).kilometers}"
+
 @tool
 def get_current_time_in_timezone(timezone: str) -> str:
     """A tool that fetches the current local time in a specified timezone.