'Run dpctl command'

def dpctl(self, *args):

    listenAddr = None
    if (not self.listenPort):
        listenAddr = ('unix:/tmp/%s.listen' % self.name)
    else:
        listenAddr = ('tcp:127.0.0.1:%i' % self.listenPort)
    return self.cmd(((('dpctl    ' + '    '.join(args)) + '    ') + listenAddr))
