in container_agent/docker_client.py [0:0]
def __port_arg(self, ip, external, internal, proto):
ips = ip and '%s:' % (ip, ) or ''
es = external and '%d:' % (external, ) or ''
ps = proto and '/%s' % (proto, ) or ''
return '-p=%s%s%d%s' % (ips, es, internal, ps)