human
Complete the below
def hashes_above(path, line_number):

    ''''Yield hashes from contiguous comment lines before line ``line_number``.'
    '''
assistant
#Here is the Python code you requested.
    def hash_lists(path):
        'Yield    lists    of    hashes    appearing    between    non-comment    lines.\n\n                                The    lists    will    be    in    order    of    appearance    and,    for    each    non-empty\n                                list,    their    place    in    the    results    will    coincide    with    that    of    the\n                                line    number    of    the    corresponding    result    from    `parse_requirements`\n                                (which    changed    in    pip    7.0    to    not    count    comments).\n\n                                '
        hashes = []
        with open(path) as file:
            for (lineno, line) in enumerate(file, 1):
                match = HASH_COMMENT_RE.match(line)
                if match:
                    hashes.append(match.groupdict()['hash'])
                if (not IGNORED_LINE_RE.match(line)):
                    (yield hashes)
                    hashes = []
                elif PIP_COUNTS_COMMENTS:
                    (yield [])
    return next(islice(hash_lists(path), (line_number - 1), None))