code: def download(name, course, github='SheffieldML/notebook/master/lab_classes/'):
      
  
      github_stub = 'https://raw.githubusercontent.com/'
      if not name.endswith('.ipynb'):
          name += '.ipynb'
      from pods.util import download_url
      download_url(os.path.join(github_stub, github, course, name), store_directory=course)
docs: Download a lab class from the relevant course
      :param course: the course short name to download the class from.
      :type course: string
      :param reference: reference to the course for downloading the class.
      :type reference: string
      :param github: github repo for downloading the course from.
      :type string: github repo for downloading the lab.