[capink]

Originally Posted by nqk

Sorry to have bugged you this much.

But it returns new error

  File "subprocess.py", line 548, in run
TypeError: Popen.__init__() got an unexpected keyword argument 'DETACHED_PROCESS'

No problem. We are trying to work this out. And I might use this to improve the stock Open With action. The problem is that the action was designed with the assumption that the format would be the last argument, which is not the case in your command.

Anyway, try this:

import subprocess
import os
from calibre.constants import iswindows, isosx

def run(gui, settings, chain):
    fmt = 'TXTZ'
    db = gui.current_db
    output_dir = 'D:\Temp'
    path_to_binary = 'C:\Program Files\7-Zip\7z.exe'
    clean_env = dict(os.environ)
    kw = {'env': clean_env, 'shell':True, 'capture_output': True}
    if iswindows:
        del clean_env['PATH']
    elif isosx:
        if path_to_binary.lower().endswith(".app"):
            path_to_binary = 'open -a ' + path_to_binary
    else: #Linux
        clean_env['LD_LIBRARY_PATH'] = ''
    for book_id in chain.scope().get_book_ids():
        path_to_format = db.format_abspath(book_id, fmt, index_is_id=True)
        title = db.title(book_id, index_is_id=True)
        if not path_to_format:
            print(f'Book {title} does not have format: {fmt}')
            continue
        cmd = f'"{path_to_binary}" e {path_to_format} -o"{output_dir}" file-to-extract -y'
        result = subprocess.run(cmd, **kw)
        if result.returncode != 0:
            prints(f'Command error: Return code is {result.returncode} when running command for file: {path_to_format}\ncmd: {cmd}')
            sys.stdout.buffer.write(b'stderr: ' + result.stderr)
            prints()