Find unused functions etc used in fish shell's PO files

fish_dev_scan_PO_files.py

import re
from pathlib import Path

p = Path("/tmp/fish-shell/po/")
for pofile in list(p.glob('*.po')):
    print(f"=============================\n{pofile}\n=============================")
    with open(pofile) as f:
        po_data = f.readlines()

    del_these = set()
    pattern = re.compile("#: \/tmp\/fish\/implicit\/share\/(.+):\d+")
    for line in po_data:
        if m := pattern.match(line):
            testp = Path('/tmp/fish-shell/share') / m.group(1)
            if not testp.exists():
                del_these.add(str(testp))
    del_these = list(del_these)
    del_these.sort()
    for x in del_these:
        print(x)