b站特别推荐视频图片抓取，请问哪有问题，run没反应

import requests
import time
import os
raw_url = 'https://www.bilibili.com/index/recommend.json'
headers = {
    'Host':'www.bilibili.com',
'X - Requested - With': 'XMLHttpRequest',
    'User - Agent':
    ' Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36'
}
def save_image(url):
    filename = url.lstrip('http://').replace('.','').replace('/','').rstrip('jpg')+'.jpg'
    try:
        res = requests.get(url, headers=headers)
        if res.ok:
            img = res.content
            if not os.path.exists(filename):
                with open(filename,'wb') as f:
                    f.write(img)
    except Exception:
        print('Failed to load the picture')
        def get_json():
            try:
                res = requests.get(raw_url, headers=headers)
                if res.ok:
                    return res.json()
                else:
                    print('not ok')
                    return False
            except Exception as e:
                print('Error here :\t',e)
                def json_parser(json):
                    if json is not None:
                        news_list = json.get('list')
                        if not news_list:
                            return False
                        for news_item in news_list:
                            pic_url = news_item.get('pic')
                            yield pic_url

                            def worker():
                                raw_json = get_json()
                                print(raw_json)
                                urls = json_parser(raw_json)
                                for url in urls:
                                    save_image(url)
                                    if __name__ == '__main__':
                                        worker()

你这函数只在创建，也没看你调用啊，而且你都写多个函数了，为什么不每个函数独立写