def parse_gtf_info_field(info_str):
    """ Parse gtf info string into a dictionary
    Args:
        info_str (str): info field from gtf
    Return:
        {key, value for field in info}
    """
    d = {}
    for pair in info_str.split('; '):
        key, value = pair.split(' ')
        d[key] = value.strip('"')
    return d