python subprocess.Popen for running external applications or scripts with interactive input  

Very well explained. Thank you

If in windows, I do: type logfile | cantools plot inputfile.dbc What would the syntax look like if I'm trying to do using Popen? The following did not work as it did not pipe the logfile contents to cantools args = ["plot inputfile.dbc"] p = Popen(['cantools'] + args, stdout=PIPE)