parameterize routing logic - extract api key as env var; allow searching dest by address; limit the number of listings to process to prevent accidental api key usage

crawler/data_access.py

@@ -166,14 +166,18 @@ class Listing:
         return max_sqm
 
     def calculate_route(self,
-                        dest_lat: float,
-                        dest_lon: float,
+                        dest_address: str,
+                        travel_mode: routing.TravelMode,
                         recalculate=False):
         if self.path_routing_json().exists() and not recalculate:
             return
 
-        result = routing.transit_route(self.latitude, self.longitude, dest_lat,
-                                       dest_lon)
+        result = routing.transit_route(
+            self.latitude,
+            self.longitude,
+            dest_address,
+            travel_mode,
+        )
         with open(self.path_routing_json(), "w") as f:
             json.dump(result, f)