#!/usr/local/cpython-3.8/bin/python3

import dohdbm


def main():
    """Main function."""

    database = dohdbm.open('big-database', 'n')

    for index in range(1000000):
        print(index)
        key = bytes(str(index), 'ascii')
        value = key

        database[key] = value

    database.close()


main()