youtube-dl: store the output filename as a variable in Python

[PenguinEino]

How to store the output filename and extension as a variable after downloading the movie using youtube-dl

        import youtube_dl
        url = input()
        cmd = 'youtube-dl -o ./%(playlist)s/%(title)s.%(ext)s -ci --extract-audio --audio-format mp3 --add-metadata ' + url
        subprocess.check_call(cmd.split())

I don't know this continuation

[dstftw]

Parse it from stdout.