query docker daemon from python

import os
from docker import Client
from docker.utils import kwargs_from_env

kwargs = kwargs_from_env()
#kwargs['tls'].assert_hostname = False
client = Client(**kwargs)

containers = client.containers()

# get all containers that are based on this image
seleniums = [c for c in containers if c['Image'] == 'u1ih/ubuntu']

# get all the published ports
urls = [s['Ports'][0]['IP'] + ':' + str(s['Ports'][0]['PublicPort']) for s in seleniums]

print urls