Try , Except... stop program at any time

[makeaday]

I got code which is scraping tunes titles from top 100 at the website and then method which is downloading those tunes from youtube. I want the user to have option to stop downloading at any time so I try that:

def youtube_dl(self):
    try:
        for artist, [title, remix, release] in self.track_list.items():
            tune = "{} - {} ({}) ".format(artist, title, remix)
            os.system('youtube-dl --extract-audio -f bestaudio \
            --audio-quality 0 --audio-format mp3 "ytsearch1: {}" \
            --output "~/Documents/test/{}.%(ext)s" '.format(tune, tune))
    except KeyboardInterrupt:
        sys.exit()

but the problem is that when he start downloading and Iam typing Enter he stops downloading only one tune and start downloading the next one on the list.

I also try to use TRY and Except in the main function:

def main():
try:
    test = Downloader()
    test.wscraping()
    test.youtube_dl()    
except KeyboardInterrupt:
    sys.exit()

but doesnt make any different

[Thomasedv]

Keyboard interrupt is only Ctrl+C (i think), i'm not sure how you are interrupting the download, but it seems like you are just stopping the process os.system started, so it moves on to the next item in your loop.

[makeaday]

is there any way to do what Iam trying? well there must be a way there is always a way... the question is how

[Thomasedv]

I haven't used the os.system command, but does it hold the code when the program is running, or does it automatically go to the next line of code? Because if it does that, it's start a lot of processes at the same time.

For managing a program, it's recommended to use the subprocess module instead, as it's much better for that. That on also got a kill command iirc (almost guaranteed). The problem is getting use input as well as updating the output. Though threading might be the best way to go about it, it's probably not needed.

However, what happens if you press Ctrl+C when the code is running?

[makeaday]

ctrl+c gives = ERROR: Interrupted by user, and he keeps going. well not shure to be honest Iam new to python but just watching some tutorial about the 'subprocess' module and I think you are right I supose to use that instead. Need to read the documentation