es 算法函数 有点不太懂了没有大神给指点一下

BeautifulSoup下载小说

import requests
from bs4 import BeautifulSoup

# 章节目录中寻找每一章的ip地址
def chapters():
    # 小说的Ip地址，使用前查看网站是否允许爬取，本篇仅供学习交流，不得用于违法，后果自负
    base_url = ""
    resp = requests.get(base_url)
    resp.encoding = "utf-8"
    bf = BeautifulSoup(resp.text, "html.parser")
    # 列表存放（每一章的url，章节名），元组的形式存放
    data = []
    for li in bf.find("ul", id="htmlChapterList").find_all("li"):
        link_a = li.find("a")
        if not link_a:
            continue
        # print(link_a)
        data.append((link_a["href"], link_a.get_text()))
        print(data)
        # break
    return data

# 返回网页的url文本
def content_novel(url):
    res = requests.get(url)
    res.encoding = "UTF-8"
    bf = BeautifulSoup(res.text, "html.parser")
    if not bf.find("div", id="htmlContent"):
        return None
    return bf.find("div", id="htmlContent").get_text()

novels = chapters()
numbers = len(novels)
ids = 0
# 保存下载的小说，以章节的形式保存
for novel_title in chapters():
    url, title = novel_title
    ids += 1
    print("download: "+str(ids)+","+"total:"+ str(numbers))
    with open("%s.txt"%title, 'w', encoding="UTF-8") as fwrite:
        if not content_novel(url):
            continue
        fwrite.write(content_novel(url))
        # print(content_novel(url))
        # break