extract_ass.py

import ass
import os
import sys

if __name__ == "__main__":
    filename = sys.argv[1]

    with open(filename, "r", encoding='utf-8-sig') as fin:
        doc = ass.parse(fin)
    
    for e in doc.events:
        if isinstance(e, ass.Dialogue) and e.style == "英":
            print(e.text.strip())