import re
with open('app/modules/sag/templates/detail.html', 'r', encoding='utf-8') as f:
    text = f.read()

s = text.find('async function saveTime()')
if s != -1:
    e = text.find('async function createTodoStep', s)
    if e == -1: e = s + 2000
    print(text[s:e])