To issue a complex Linux command in Python

Here is an quick example: 

cmd = "diff <(ssh -n root@10.22.254.34 cat /vms/cloudburst.qcow2.*) <(ssh -n root@10.22.254.101 cat /vms/cloudburst.qcow2)"
output,error = subprocess.Popen(['/bin/bash', '-c', cmd], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()