human
I wrote the below code

    encoding = (obj.encoding if isinstance(obj, TextResponse) else (encoding or 'utf-8'))
    def _getrow(csv_r):
        return [to_unicode(field, encoding) for field in next(csv_r)]
    if six.PY3:
        lines = StringIO(_body_or_str(obj, unicode=True))
    else:
        lines = BytesIO(_body_or_str(obj, unicode=False))
    kwargs = {}
    if delimiter:
        kwargs['delimiter'] = delimiter
    if quotechar:
        kwargs['quotechar'] = quotechar
    csv_r = csv.reader(lines, **kwargs)
    if (not headers):
        headers = _getrow(csv_r)
    while True:
        row = _getrow(csv_r)
        if (len(row) != len(headers)):
            logger.warning('ignoring    row    %(csvlnum)d    (length:    %(csvrow)d,    should    be:    %(csvheader)d)', {'csvlnum': csv_r.line_num, 'csvrow': len(row), 'csvheader': len(headers)})
            continue
        else:
            (yield dict(zip(headers, row)))

What's a good function header?
assistant
#Here's a good function header.

def csviter(obj, delimiter=None, headers=None, encoding=None, quotechar=None):