feat: Add routes_ids_for_agency.py example

Author: Ahmedhossamdev

examples/routes_ids_for_agency.py

@@ -0,0 +1,23 @@
+from helpers.load_env import load_settings
+
+from onebusaway import OnebusawaySDK
+
+# Load settings from .env file, if it exists. If not, we'll use the
+# Puget Sound server URL (which is also the default in the SDK) and
+# the 'TEST' API key.
+settings = load_settings(
+    {
+        "api_key": "TEST",
+        "base_url": "https://api.pugetsound.onebusaway.org/",
+    }
+)
+
+# Create a new instance of the OneBusAway SDK with the settings we loaded.
+oba = OnebusawaySDK(**settings)
+
+agency_id = "40"  # Link Light Rail in the Seattle area.
+
+route_ids = oba.route_ids_for_agency.list(agency_id)
+if route_ids.data and route_ids.data.list:
+    for route_id in route_ids.data.list:
+        print(route_id)