PICKLE_FILENAME_INSTRUCTION_IDS = 'pickled_instruction_ids.txt'

def compare_instruction_id_list_with_baseline(baselineidspicklefile):
    baseline_ids = load_pickled_ids(baselineidspicklefile)
    current_main_url_content = get_page_content(main_url_test)
    root = lh.fromstring(current_main_url_content)
    current_ids = get_instruction_ids(root)
    diff = [id for id in current_ids if id not in baseline_ids]
    return diff

response = urllib2.urlopen(url)
content = response.read()