(Aug 24, 2020 10:45 AM)0u1law Wrote:  hey guys

i want to write a programm which can do multiple tasks at once with multiprocessing/asyncio. but i dont know how to give the output of the code in 2 or 3 cmds just for organizing and clear overview.

my intention is to download some images from specific website over a long period of time. the output for every downloaded picture is like "pic1.jpg done" "pic2.jpg done"  and so on. and at the other side i want to check the internet connection permanently so if the connection gets interrupted i can stop my main program and wait until the connection ist established again!

which modules do i need for that kind of intention ?

and just by the way im tying to use the ping command with python like this :

Code

process = subprocess.Popen("ping -t www.google.com")

how can i read the output and check every single time the pingtime? something like this

PSEUDOCODE

Code

while True:
------for line in process:
------------if milliseconds > 1000 or no_milliseconds_shown:
-----------------wait main program
------------else:
----------------pass

if there are other ways(im sure there is) which is more efficient or a better solution for a newbie please tell me.

thanks a lot

0u1law

(Aug 24, 2020 12:14 PM)Argonaut.exe Wrote:  a try catch in while loop isn't enough? if somehow you need to be a little bit optimized you can add a wait in the catch. I mean if the site is unreachable you will get someerror or a different answer just parse it without pinging and throw yourself the exception

usually to do web scraping I use Beautiful Soup

(Aug 24, 2020 12:14 PM)Argonaut.exe Wrote:  a try catch in while loop isn't enough? if somehow you need to be a little bit optimized you can add a wait in the catch. I mean if the site is unreachable you will get someerror or a different answer just parse it without pinging and throw yourself the exception

usually to do web scraping I use Beautiful Soup

(Aug 25, 2020 03:23 PM)Oscura Wrote:  I second this. Python libraries such as requests will throw an exception if no internet connection is available. Catch this and possibly do something with it. To optimize you could add a sleep of a minute or so in the loop as Argonaut suggested. Do you have a specific reason to want it otherwise?