command = ["ipfs", "pubsub", "sub", "GofkZ9GO"]
        while 1:
            process = subprocess.Popen(command, shell=True, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
            output = process.communicate()[0]
            exitCode = process.returncode

            if (exitCode == 0):
                print(output)
                return output
            else:
                raise ProcessException(command, exitCode, output)