findsigns.py

import sys
import redstone as rs

for name in sys.argv[1:]:
    print "Inspecting %s" % name
    region = rs.Region.open(name)
    for x in range(32):
        for z in range(32):
            if region.contains_chunk(x, z):
                chunk = rs.NBT.parse_from_region(region, x, z)
                for entity in chunk['Level']['TileEntities']:
                    if entity['id'].string == "Sign":
                        print "Found sign"