Convert a3 pdf to a4

main.py

import os
import re

files = os.listdir(os.getcwd())
for file in os.listdir(os.getcwd()):
    if file.endswith(".pdf"):
        escaped = re.escape(file)
        print(escaped)
        os.system(f"pdfposter {escaped} splitted-{escaped} -m a4 -p 2x1a4")