def pull(opts):
for i in IMAGES + (EXTRA_IMAGES if opts['<STR_LIT>'] else []):<EOL><INDENT>retrying_pull_image(i)<EOL><DEDENT>
Download or update required datacats docker images

Usage:
  datacats pull [-a]

Options:
  -a --all           Pull optional images as well as required
                     images. Optional images will be pulled
                     when needed, but you can use this to make
                     sure you have all the images you need if
                     you are going offline.