code: def fetch_image(client, name):
      
      try:
          image = client.images.get(name)
      except docker.errors.ImageNotFound:
          name, tag = _parse_image_tag(name)
          tag = 'latest' if tag is None else tag
  
          log.info("Pulling tag '{}' for image '{}'...".format(tag, name))
          image = client.images.pull(name, tag=tag)
  
      log.debug("Found image '{}' for tag '{}'".format(image.id, name))
      return image
docs: Fetch an image if it isn't already present.
  
      This works like ``docker pull`` and will pull the tag ``latest`` if no tag
      is specified in the image name.