docs: def find_needed_input(input_format):
      """
      Find a needed input class
      input_format - needed input format, see utils.input.dataformats
      """
      needed_inputs = [re.cls for re in registry if re.category==RegistryCategories.inputs and re.cls.input_format == input_format]
      if len(needed_inputs)>0:
          return needed_inputs[0]
      return None