求助，为什么输出的文件里没有内容import requestsfrom bs4 import BeautifulSoupimport csv# 提取电影信息def movies_spider(): movie_url = "https://movie.douban.com/top250?start={}&filter=" movie_num = 0 movie_name = '名称' movie_year = '年份' movie_country = '国家' movie_type = '类型' movie_director = '导演' movie_assess = '评价人数' movie_score = '评分' f = open('movies.csv', 'w', newline='', encoding='utf-8') writer = csv.writer(f) writer.writerow([ movie_num, movie_name, movie_year, movie_country, movie_type, movie_director, movie_assess, movie_score ]) for list in range(10): movie_content = requests.get(movie_url.format(list * 25)).text soup = BeautifulSoup(movie_content, 'lxml') for li in soup.select('ol li'): movie_num = li.select('em')[0].string movie_name = li.select('.title')[0].string movie_info = li.select('.bd .')[0].get_text().strip().split('\xa0/\xa0') # 电影信息 movie_year = movie_inf