code: def get_client():
      
      info = {}
      host = os.environ.get('DOCKER_HOST')
      net_host = os.environ.get('DOCKER_NET_HOST')
  
      client_api_version = os.environ.get('DOCKER_API_VERSION')
      if not client_api_version:
          client_api_version = "auto"
  
      # IP to use for started containers
      if net_host:
          info['host'] = net_host
      elif host:
          info['host'] = urlparse.urlparse(host).netloc.split(':')[0]
      else:
          info['host'] = 'localhost'
  
      verify = os.environ.get('DOCKER_TLS_VERIFY') == '1'
      if verify: # use TLS
          assert_hostname = None
          cert_path = os.environ.get('DOCKER_CERT_PATH')
          if cert_path:
              client_cert = (os.path.join(cert_path, 'cert.pem'), os.path.join(cert_path, 'key.pem'))
              ca_cert = os.path.join(cert_path, 'ca.pem')
          else:
              client_cert = ca_cert = None
  
          tls_config = docker.tls.TLSConfig(
              client_cert=client_cert,
              ca_cert=ca_cert,
              verify=verify,
              assert_hostname=assert_hostname,
          )
          return docker.Client(base_url=host, tls=tls_config, version=client_api_version), info
      else:
          return docker.Client(base_url=host, version=client_api_version), info
docs: Set DOCKER_HOST (and probably DOCKER_TLS_VERIFY and DOCKER_CERT_PATH) to connect to a docker instance through TCP.
      Leave DOCKER_HOST unset and it will use the default, typically unix:/var/run/docker.sock
  
      It also needs to know how to connect to ports on the docker container after creating it.
      Set DOCKER_NET_HOST to provide an IP address to connect to the VNC ports on
      otherwise if DOCKER_HOST has a hostname, it will connect to the VNC ports using that name.
      otherwise it connects using localhost