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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 from_dict( cls, dictionary, root_section="root", delimiter=DEFAULT_DELIMITER, empty_sections=False, ):
 """ Create an instance of ``INIParser`` from a given dictionary. :param dict dictionary: The dictionary to create an instance from :param str root_section: The root key of the ini content, defaults to "root", optional :param str delimiter: The delimiter character to use for nested dictionaries, defaults to ":", optional :param bool empty_sections: Flag to allow representation of empty sections to exist, defaults to False, optional :return: The new ``INIParser`` instance :rtype: INIParser """


        parser = cls()
        parser.add_section(root_section)
        return cls._build_parser(
            dictionary,
            parser,
            root_section,
            delimiter=delimiter,
            empty_sections=empty_sections,
        )