code: def from_soup_tag(tag):
          "Creates an instance from a given soup tag."
          sections = [Section.from_soup_tag(s) for s in tag.findAll('section')]
          return Course(
              tag['name'], tag['dept'], int(tag['num']), tag['credmin'],
              tag['credmax'], tag['gradetype'], [s for s in sections if s.is_valid]
          f from_soup_tag(tag):
          "Creates an instance from a given soup tag."
          sections = [Section.from_soup_tag(s) for s in tag.findAll('section')]
          return Course(
              tag['name'], tag['dept'], int(tag['num']), tag['credmin'],
              tag['credmax'], tag['gradetype'], [s for s in sections if s.is_valid]
          )
docs: Creates an instance from a given soup tag.