Quick and dirty .srt file translation using cheeseshop packages translate, funcy

trans.py

import sys
import srt
from translate import Translator
import funcy as fy

codec = 'ISO-8859-1'

tr = Translator('sv', email='your.adress@provider.x')

inf = sys.argv[-1]
outf = f"{inf.split('.srt')[0]}-sv.srt"

translated = ()

with open(sys.argv[-1], encoding=codec) as fp:
    texts = srt.parse(fp.read())

try:
    out = open(outf, encoding=codec)
    translated = srt.parse(out.read())
    resume = fy.last(translated).index
    out.close()
    out = open(outf, 'a')
except IOError:
    out = open(outf, 'w', encoding=codec)
    resume = 0

for text in texts:
    if text.index > resume:
        sv = tr.translate(text.content)
        print(f"TEXT {text.index}, {sv}")
        out.write(text.to_srt().replace(text.content, sv))
        resume += 1

print(f"{inf} translation done.")