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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _operation_speak_as_literal_punctuation( self, content, index, children ):
 """ The operation method of _speak_as method for literal-punctuation. :param content: The text content of element. :type content: str :param index: The index of pattern in text content of element. :type index: int :param children: The children of element. :type children: list(hatemile.util.html.htmldomelement.HTMLDOMElement) """


        data_property_value = 'literal-punctuation'
        if index != 0:
            children.append(self._create_content_element(
                content[0:index],
                data_property_value
            ))
        children.append(self._create_aural_content_element(
            (
                ' '
                + self._get_description_of_symbol(content[index:(index + 1)])
                + ' '
            ),
            data_property_value)
        )

        children.append(self._create_visual_content_element(
            content[index:(index + 1)],
            data_property_value
        ))

        return children