sort-bru-by-name.py

import os

folders: list[str] = os.listdir('./')
folders = list(filter(lambda fldr: not fldr.startswith('.') and os.path.isdir(fldr), folders))

for folder in folders:
    files: list[str] = os.listdir(folder)
    files = list(filter(lambda f: f.endswith('.bru'), files))
    files = sorted(files)

    for file in files:
        pos: int = files.index(file) + 1

        content = open(f"{folder}/{file}", 'r', encoding='utf-8').read()
        old_seq = list(filter(lambda i: "  seq: " in i, content.split('\n')))
        new_seq = f"  seq: {pos}"

        if len(old_seq) == 0:
            print(f'WARN: seq not found in {folder}/{file}, skipped')
            continue

        content = content.replace(old_seq[0], new_seq, 1)
        with open(f"{folder}/{file}", 'w', encoding='utf-8') as fd:
            fd.write(content)