ciscorn

import sys
import mmap

# usage:
# $ python3 rewrite_rp.py 1.dat 001

with open(sys.argv[1], 'rb+') as f:
    with mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_WRITE) as m:
        (curr_rp, new_rp) = (m[1], int(sys.argv[2]))
        print("{0:03d} -> {1:03d}".format(curr_rp, new_rp))

ciscorn

digraph joetsu_merge {
    graph [rankdir = LR];

    "下ノ郷村" -> "金谷村";
    "北大崎村" -> "金谷村";
    "金谷村" -> "高田市\n(1954)";
    "新道村" -> "高田市\n(1954)";

    "高田町" -> "高田町\n(1908)";
    "高城村" -> "高田町\n(1908)";