text: import requests
  from config import COOKIES, HEADERS, COMMA_ASCII, ENROLLMENT_URL
  
  def enroll(courses):
      # build course params
      params = "choice%5BU2HA%5D=" + COMMA_ASCII.join(courses) + "&submit.x=102&submit.y=23"
  
      # enroll
      return requests.post(ENROLLMENT_URL, params=params, headers=HEADERS, cookies=COOKIES)
  