Print trip table

def print_trip_table(document):
    """ Print trip table """
    headers = [
        'Alt.',
        'Name',
        'Time',
        'Track',
        'Direction',
        'Dest.',
        'Track',
        'Arrival']
    table = []
    altnr = 0
    for alternative in document:
        altnr += 1
        first_trip_in_alt = True
        if not isinstance(alternative['Leg'], list):
            alternative['Leg'] = [alternative['Leg']]
        for part in alternative['Leg']:
            orig = part['Origin']
            dest = part['Destination']
            row = [
                altnr if first_trip_in_alt else None,
                part['name'],
                orig['rtTime'] if 'rtTime' in orig else orig['time'],
                orig['track'],
                part['direction'] if 'direction' in part else None,
                dest['name'],
                dest['track'],
                dest['rtTime'] if 'rtTime' in dest else dest['time'],
                ]
            table.append(row)
            first_trip_in_alt = False
    print(tabulate.tabulate(table, headers))