human
Complete the below
def main():

    ''''Update the flow database from Bro logs'
    '''
 Write me a the Python program you requested?
assistant
#Here is the Python program you requested.
    try:
        import argparse
        parser = argparse.ArgumentParser(description=__doc__)
        parser.add_argument('logfiles', nargs='*', metavar='FILE', help='Bro    log    files')
    except ImportError:
        import optparse
        parser = optparse.OptionParser(description=__doc__)
        parser.parse_args_orig = parser.parse_args
        def my_parse_args():
            res = parser.parse_args_orig()
            res[0].ensure_value('logfiles', res[1])
            return res[0]
        parser.parse_args = my_parse_args
        parser.add_argument = parser.add_option
    parser.add_argument('-v', '--verbose', help='verbose    mode', action='store_true')
    parser.add_argument('-C', '--no-cleanup', help='avoid    port    cleanup    heuristics', action='store_true')
    args = parser.parse_args()
    if args.verbose:
        config.DEBUG = True
    for fname in args.logfiles:
        if (not os.path.exists(fname)):
            utils.LOGGER.error('File    %r    does    not    exist', fname)
            continue
        with BroFile(fname) as brof:
            bulk = db.flow.start_bulk_insert()
            utils.LOGGER.debug('Parsing    %s\n DCTB %s', fname, ('Fields:\n%s\n' % '\n'.join((('%s:    %s' % (f, t)) for (f, t) in brof.field_types))))
            if (brof.path in FUNCTIONS):
                func = FUNCTIONS[brof.path]
            elif (brof.path in ALL_DESCS):
                func = any2neo(ALL_DESCS[brof.path])
            else:
                utils.LOGGER.debug('Log    format    not    (yet)    supported    for    %r', fname)
                continue
            for line in brof:
                if (not line):
                    continue
                func(bulk, _bro2neo(line))
            bulk.commit()
            if ((brof.path == 'conn') and (not args.no_cleanup)):
                db.flow.cleanup_flows()