How to use the tablib.packages.openpyxl.shared.xmltools.QName function in tablib

def get_text(xmlns, rich_node):
    """Read rich text, discarding formatting if not disallowed"""
    text_node = rich_node.find(QName(xmlns, 't').text)
    partial_text = text_node.text  or ''

    if text_node.get(QName(NAMESPACES['xml'], 'space').text) != 'preserve':
        partial_text = partial_text.strip()
    return unicode(partial_text)

def get_number_of_parts(xml_source):
    """Get a list of contents of the workbook."""
    parts_size = {}
    parts_names = []
    root = fromstring(xml_source)
    heading_pairs = root.find(QName('http://schemas.openxmlformats.org/officeDocument/2006/extended-properties',
            'HeadingPairs').text)
    vector = heading_pairs.find(QName(NAMESPACES['vt'], 'vector').text)
    children = vector.getchildren()
    for child_id in range(0, len(children), 2):
        part_name = children[child_id].find(QName(NAMESPACES['vt'],
                'lpstr').text).text
        if not part_name in parts_names:
            parts_names.append(part_name)
        part_size = int(children[child_id + 1].find(QName(
                NAMESPACES['vt'], 'i4').text).text)
        parts_size[part_name] = part_size
    return parts_size, parts_names

def get_string(xmlns, string_index_node):
    """Read the contents of a specific string index"""
    rich_nodes = string_index_node.findall(QName(xmlns, 'r').text)
    if rich_nodes:
        reconstructed_text = []
        for rich_node in rich_nodes:
            partial_text = get_text(xmlns, rich_node)
            reconstructed_text.append(partial_text)
        return ''.join(reconstructed_text)
    else:
        return get_text(xmlns, string_index_node)

def get_number_of_parts(xml_source):
    """Get a list of contents of the workbook."""
    parts_size = {}
    parts_names = []
    root = fromstring(xml_source)
    heading_pairs = root.find(QName('http://schemas.openxmlformats.org/officeDocument/2006/extended-properties',
            'HeadingPairs').text)
    vector = heading_pairs.find(QName(NAMESPACES['vt'], 'vector').text)
    children = vector.getchildren()
    for child_id in range(0, len(children), 2):
        part_name = children[child_id].find(QName(NAMESPACES['vt'],
                'lpstr').text).text
        if not part_name in parts_names:
            parts_names.append(part_name)
        part_size = int(children[child_id + 1].find(QName(
                NAMESPACES['vt'], 'i4').text).text)
        parts_size[part_name] = part_size
    return parts_size, parts_names

def get_number_of_parts(xml_source):
    """Get a list of contents of the workbook."""
    parts_size = {}
    parts_names = []
    root = fromstring(xml_source)
    heading_pairs = root.find(QName('http://schemas.openxmlformats.org/officeDocument/2006/extended-properties',
            'HeadingPairs').text)
    vector = heading_pairs.find(QName(NAMESPACES['vt'], 'vector').text)
    children = vector.getchildren()
    for child_id in range(0, len(children), 2):
        part_name = children[child_id].find(QName(NAMESPACES['vt'],
                'lpstr').text).text
        if not part_name in parts_names:
            parts_names.append(part_name)
        part_size = int(children[child_id + 1].find(QName(
                NAMESPACES['vt'], 'i4').text).text)
        parts_size[part_name] = part_size
    return parts_size, parts_names

def get_number_of_parts(xml_source):
    """Get a list of contents of the workbook."""
    parts_size = {}
    parts_names = []
    root = fromstring(xml_source)
    heading_pairs = root.find(QName('http://schemas.openxmlformats.org/officeDocument/2006/extended-properties',
            'HeadingPairs').text)
    vector = heading_pairs.find(QName(NAMESPACES['vt'], 'vector').text)
    children = vector.getchildren()
    for child_id in range(0, len(children), 2):
        part_name = children[child_id].find(QName(NAMESPACES['vt'],
                'lpstr').text).text
        if not part_name in parts_names:
            parts_names.append(part_name)
        part_size = int(children[child_id + 1].find(QName(
                NAMESPACES['vt'], 'i4').text).text)
        parts_size[part_name] = part_size
    return parts_size, parts_names