LayoutTests/imported/w3c/web-platform-tests/html/semantics/document-metadata/interactions-of-styling-and-scripting/stylesheet.py

from time import sleep
def main(request, response):
  if "delay" in request.GET:
    delay = int(request.GET["delay"])
    sleep(delay)

  if "stylesNotMatchingEnvironment" in request.GET:
    return 'h1 {color: brown;}'
  else:
    return 'h1 {color: purple;}'