docs: def reformat_file(self, input_file, input_format, output_format):
          """
          Reformat input data files to a format the tasks can use
          """
          #Return none if input_file or input_format do not exist
          if input_file is None or input_format is None:
              return None
          #Find the needed input class and read the input stream
          try:
              input_cls = self.find_input(input_format)
              input_inst = input_cls()
          except TypeError:
              #Return none if input_cls is a Nonetype
              return None
          #If the input file cannot be found, return None
          try:
              input_inst.read_input(self.absolute_filepath(input_file))
          except IOError:
              return None
  
          formatter = find_needed_formatter(input_format, output_format)
          if formatter is None:
              raise Exception("Cannot find a formatter that can convert from {0} to {1}".format(self.input_format, output_format))
          formatter_inst = formatter()
          formatter_inst.read_input(input_inst.get_data(), input_format)
          data = formatter_inst.get_data(output_format)
          return data