human
Solve the following python programming problem given the following code:
def _get_document_data(f, image_handler = None) : 
    '
    ``f`` is a ``ZipFile`` that is open
    Extract out the document data, numbering data and the relationship data.
    ' 
    if (image_handler is None) : 
        def image_handler(image_id, relationship_dict) : 
            return relationship_dict.get (image_id) 
document_xml = None 
    numbering_xml = None 
    relationship_xml = None 
    styles_xml = None 
    parser = etree.XMLParser (strip_cdata = False) 
    (path, _) = os.path.split (f.filename) 
    media = { 
        
} 
    image_sizes = { 
        
} 
    for item in f.infolist () : 
        if (item.filename == 'word/document.xml') : 
            xml = f.read (item.filename) 
            document_xml = etree.fromstring (xml, parser) 
else : 
            if (item.filename == 'word/numbering.xml') : 
                xml = f.read (item.filename) 
                numbering_xml = etree.fromstring (f, parser) 
else : 
                if (item.filename == 'word/styles.xml') : 
                    xml = f.read (item.filename) 
                    styles_xml = etree.fromstring (xml, parser) 
else : 
                    if (item.filename == 'word/_rels/document.xml.rels') : 
                        xml = f.read (item.filename) 
                        try : 
                            relationship_xml = etree.fromstring (xml, parser) 
except XMLSyntaxError : 
                            relationship_xml = etree.fromstring ('<xml></xml>', parser) 
if item.filename.startswith ('word/media/') : 
            media [item.filename [len ('word/') :]] = f.extract (item.filename, path) 
f.close () 
    numbering_dict = get_numbering_info (numbering_xml) 
    image_sizes = get_image_sizes (document_xml) 
    relationship_dict = get_relationship_info (relationship_xml, media, image_sizes) 
    styles_dict = get_style_dict (styles_xml) 
    font_sizes_dict = defaultdict (int) 
    if DETECT_FONT_SIZE : 
        font_sizes_dict = get_font_sizes_dict (document_xml, styles_dict) 
meta_data = MetaData...

    
    

    Fix the buggy line: numbering_xml = etree.fromstring (f, parser)
assistant
#Here is Python program to fix the buggy line: numbering_xml = etree.

numbering_xml = etree.fromstring (xml, parser)