Perform one-to-one file conversion.
        :return: None
        :rtype: :py:obj:`None`

def _one_to_one(self):
        """Perform one-to-one file conversion.
        :return: None
        :rtype: :py:obj:`None`
        """
        if not self.file_generator.to_path_compression:
            self._to_textfile(self.file_generator)
        elif self.file_generator.to_path_compression == "gz":
            self._to_gzipfile(self.file_generator)
        elif self.file_generator.to_path_compression == "bz2":
            self._to_bz2file(self.file_generator)
        elif self.file_generator.to_path_compression in ("tar", "tar.gz", "tar.bz2", "zip"):
            raise TypeError('One-to-many conversion, cannot convert "{}" into "{}"'.format(self.file_generator.from_path,
                                                                                           self.file_generator.to_path))
        else:
            raise TypeError('Unknown format: "{}"'.format(self.file_generator.to_path))