code: def _read_value(path):
      
      read_value = 0
      if not os.path.exists(path):
          # Path will generally only exist on a Raspberry Pi
          pass
      else:
          with open(path) as f:
              read_value = int(f.read())
      return read_value
docs: Reads value of specified path.
      :param path: A valid system path