import subprocess

 host =  "xxx.xxx.xxx.xxx"
 user = "cassandra"
 password = "cassandra"
 process = subprocess.Popen("cqlsh " + host + " -u " + user + " -p " + password, shell=True)
 exitCode = process.wait()
 if exitCode == 0:
     print "Job Done!"
 else:
     print "Still working!"