web crawler : url 링크가 더이상 존재하지 않을 때

def get_next_target(page): start_link = page.find('<a href=') #Insert your code below here if start_link == -1: return None, 0 start_quote = page.find('"', start_link) end_quote = page.find('"', start_quote + 1) url = page[start_quote + 1:end_quote] return url, end_quote