#!/usr/bin/python
# -*- coding: utf-8 -*-
import sys

import leveldb

def main(argv):
    db = leveldb.LevelDB(argv[1], create_if_missing=False)
    for k, v in db.RangeIter(argv[2] if len(argv) > 2 else None,
                             argv[3] if len(argv) > 3 else None):
        print `k`, `v`

if __name__ == '__main__':
    main(sys.argv)