Popen a command that contains need to say yes for all outputs

Question

I need to automate the following command

cmd=\"yes | vgremove \"

whenever I code this command with

Popen(cmd.spli         


        

Answer 1

Piping is a shell feature, so you'll need shell=True on that. What you're doing without shell=True is executing yes with arguments. yes never stops executing so the subprocess never returns.

Answer 2

There is a much easier way in this case:

Popen('vgremove -f <vgname>')

As for your question specifically:

p = Popen(cmd.split(), stdout=PIPE, stderr=PIPE, stdin=PIPE)
p.stdin.write('yes')