为什么我的函数命令突然执行不了了呀？

Question

昨天第一次用了成功了，然后再用就没反应了，不知道为啥，代码如下

# 1. 如何提取单个页面的数据
# 2. 上线程池，多个页面同时抓取
import requests
from lxml import etree
import csv
from concurrent.futures import ThreadPoolExecutor

result = []
f = open("data1.csv", mode="w", encoding="utf-8", newline="")
csvwriter = csv.writer(f)
def download_one_page(url):  # 拿到页面源代码
    headers = {
        "user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) "
                      "Chrome/97.0.4692.99 Safari/537.36 Edg/97.0.1072.69"
    }
    resp = requests.get(url, headers=headers)
    html = etree.HTML(resp.text)
    table = html.xpath("/html/body/div[3]/div[1]/div/div[1]/ol")[0]
    trs = table.xpath("./li")  # [1:]  # 不要第0个数据
    # trs = table.xptah("./li[position()>1]")  # 不要第0个数据
    for li in trs:
        title = li.xpath("./div/div[2]/div[1]/a/span[1]/text()")
        rating = li.xpath("./div/div[2]/div[2]/div/span[2]/text()")
        oneresult = [title, rating]
        result.append(oneresult)
        #存放数据
        csvwriter.writerow([title, rating])
        f.close()
    print(url, "提取完毕")


if __name__ == "__main__":
    # 创建线程池
    with ThreadPoolExecutor(50) as t:
        for i in range(0, 250):
            # 把下载任务交给线程池
            t.submit(download_one_page, f"https://movie.douban.com/top250?start={i}&filter=")

    print("全部下载完毕")

报错信息如下，也不知道是不是算报错信息，每次运行代码时候都提示
而且你们看她只执行了最后的print，函数def里面的print直接忽略了

C:\Python\Python37\python.exe D:/文档/研究生阶段/python/爬虫/小试牛刀/线程池和进程池实战.py
C:\Python\Python37\lib\site-packages\requests_init_.py:104: RequestsDependencyWarning: urllib3 (1.26.8) or chardet (2.0.3)/charset_normalizer (2.0.10) doesn't match a supported version!
RequestsDependencyWarning)
全部下载完毕

Process finished with exit code 0

Answer 1

换个别的名字？