def _row2trextra(row, attr=None):
    cols = escape(row).split(',')
    attr_tr = attr.get('TR', '')
    attr_td = attr.get('TD', '')
    return (('<TR%s>' % attr_tr)
            + ''.join('<TD%s>%s</TD>' % (attr_td, data) for data in cols)
            + '</TR>')

def csv2htmlextra(txt, header=True, attr=None):
    ' attr is a dictionary mapping tags to attributes to add to that tag'

    attr_table = attr.get('TABLE', '')
    attr_thead = attr.get('THEAD', '')
    attr_tbody = attr.get('TBODY', '')
    htmltxt = '<TABLE%s>\n' % attr_table
    for rownum, row in enumerate(txt.split('\n')):
        htmlrow = _row2trextra(row, attr)
        rowclass = ('THEAD%s' % attr_thead) if (header and rownum == 0) else ('TBODY%s' % attr_tbody)
        htmlrow = '  <%s>%s</%s>\n' % (rowclass, htmlrow, rowclass[:5])
        htmltxt += htmlrow
    htmltxt += '</TABLE>\n'
    return htmltxt

htmltxt = csv2htmlextra(csvtxt, True,
                        dict(TABLE=' border="1" summary="csv2html extra program output"',
                             THEAD=' bgcolor="yellow"',
                             TBODY=' bgcolor="orange"'
                             )
                        )
print(htmltxt)