findshit.py

import glob
import os

from nbt.region import RegionFile

world_name = '144_76_72_236'
entity_list = []


def main():
    for file_name in glob.iglob(world_name + '/**/*.mca', recursive=True):
        region = RegionFile(file_name)
        poop = file_name.split(os.sep)[-3]

        # noone cares about modded dimensions
        if poop == 'DIM-1' or poop == 'DIM1':
            dimension = poop
        else:
            dimension = 'DIM0'

        for chunk in region.iter_chunks():
            entities = chunk['Level']['Entities']
            for entity in entities:
                uuid = str(entity['UUIDLeast']) + str(entity['UUIDMost'])
                if uuid in entity_list:
                    print('DUP: ' + str(entity['id']) + ' in ' + str(dimension) + ' at ' + str(entity['Pos']))
                entity_list.append(uuid)


if __name__ == '__main__':
    main()