Maps, GIS, Geospatial, Dataviz, Python.
os.listdir(root + '/' + city) if '20' in f][0] for city in cities} updated The output of this cell: The exact recording time of my GTFS data dumps. Now, let’s take a closer look at the different files stored in these folders: for city in cities: print(len(os.listdir(root + '/' + city + '/' +