code: def get_volume(self, id):
          
          # If the id is actually a path
          if exists(id):
              with open(id) as file:
                  size = os.lseek(file.fileno(), 0, os.SEEK_END)
              return {'path': id, 'size': size}
          return self.volume.get(id)
docs: return volume information if the argument is an id or a path