python 批量下载某站视频

import os
import os.path
import you_get
from lxml import etree
import requests


# 获取所有的视频url
def get_url(ID):
    video_url = 'https://www.bilibili.com/video/'
    # ID = 'BV1Kh411r7uR'
    home_url = video_url + ID
    headers = {
        'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36'
    }
    response = requests.get(home_url, headers=headers)
    response.encoding = 'utf-8'
    text = response.text

    html = etree.HTML(text)
    li_list = html.xpath('//div[@]/ul/li')
    print(len(li_list))

    url_list = []
    for i in range(1, len(li_list) + 1):
        url = '{}{}?p={}'.format(video_url, ID, i)
        url_list.append(url)
        print(url)

    return url_list

# 检测
def detection(ID, name):
    status = True

    try:
        # 获取所有的视频url
        url_list = get_url(ID)
        # 统计共有多少个视频
        num = len(url_list)
        # 展示一共多少个视频
        print('共有{}个视频'.format(num))
    except:
        print('获取视频失败')
        url_list = []
        status = False

    # 判断用户是否输入内容
    if name:
        # 获取当前工作目录
        path = os.getcwd()
        # 拼接文件目录
        file_path = os.path.join(path, name)
        if os.path.isdir(file_path):
            print('该文件已存在，请重新命名')
            status = False
        else:
            print('文件夹名称没问题')
    else:
        print('请输入创建文件夹的名称')
        status = False

    return status, url_list

# 开始批量下载b站视频
def Start():
    ID = input('请输入视频ID：')
    name = input('请输入文件夹名称')

    result, url_list = detection(ID, name)
    if result == True:
        # 创建保存视频的文件夹
        os.mkdir(name)

        # 获取当前工作目录
        path = os.getcwd()
        # 拼接文件目录
        video_path = os.path.join(path, name)
        # 切换到保存视频的文件夹
        os.chdir(video_path)

        p = 1
        # 下载视频
        for url in url_list:
            os.system('you-get {}'.format(url))
            print('已下载{}个视频'.format(p))
            p += 1
        print('已完成')
    else:
        print('出问题了，请重新运行！')
        
Start()

运行代码后，在终端中输入视频的ID号，保存视频的文件夹名称，如果没有问题，就会开始下载，如果有问题就重新运行，重新输入内容