def del_config(args, db):
    if args.all:
        for conf in get_all_from_db(db, 'config'):
            del_from_db(db, 'config', conf['username'])
    elif args.username is not None:
        del_from_db(db, 'config', args.username)
def del_bid(args, db):
    bidbuy = get_from_db(db, 'bid', args.id)
    if len(bidbuy) > 0:
        del_from_db(db, 'bid', args.id)
def del_buy(args, db):
    buy = get_from_db(db, 'buy', args.id)
    if len(buy) > 0:
        del_from_db(db, 'buy', args.id)