POEditor add reference to exported .po file

poeditor_add_reference_to_po.py

#!/usr/bin/env python3

import argparse
import polib

parser = argparse.ArgumentParser()

parser.add_argument('-s', '--source', nargs=1, 
                    help='source PO file')
parser.add_argument('-r', '--reference', nargs=1, 
                    help='reference PO file')

args = parser.parse_args()

if not (args.source and args.reference):
    raise SystemExit("Both reference and source are needed")

po_source = polib.pofile(args.source[0])
po_reference = polib.pofile(args.reference[0])

for entry in po_source:
	# Find the translation in the reference file and put this as comment
    entry.tcomment = po_reference.find(entry.msgid).msgstr

# Store the source file again
po_source.save(args.source[0])