+def pull_docker(layer, tag):
+ """Pull docker image for given layer
+ """
+ cmd = ("docker pull akraino/validation:{0}-{1}"
+ .format(layer, tag))
+
+ args = [cmd]
+ try:
+ print('\nPulling image using {}'.format(args), flush=True)
+ subprocess.call(args, shell=True)
+ except OSError:
+ raise BluvalError(OSError)
+
+