Python

Question

我有一个网页，其中包含几个指向文本文件的链接，这些文本文件被标记为：“2013 年 7 月 6 日，星期六”，其文件的超链接以：*_130706.txt 结尾。有人可以指导我将标签中包含 2013 的文件的所有内容写入文本文件的脚本吗？文本文件位于标签中。到目前为止，我已经能够以 xml 格式输出 html：

from lxml import html

from bs4 import BeautifulSoup

import urllib




string = '2013'

my_url = 'url'

html = urllib.request.urlopen(my_url).read()

html_page = BeautifulSoup(html, features='lxml')

有什么建议吗？

Answer 1

我的解决方案是

#!/usr/bin/python
# -*- coding: UTF-8 -*-
import requests
from bs4 import BeautifulSoup

if __name__ == "__main__":
    headers = {
        "Host": "web.mta.info",
        "Connection": "keep-alive",
        "Pragma": "no-cache",
        "Cache-Control": "no-cache",
        "Upgrade-Insecure-Requests": "1",
        "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) "
                      "Chrome/87.0.4280.88 Safari/537.36",
        "Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,"
                  "application/signed-exchange;v=b3;q=0.9",
        "Accept-Encoding": "gzip, deflate",
        "Accept-Language": "zh-CN,zh;q=0.9,en;q=0.8",
        "Cookie": "_ga=GA1.2.941711768.1610503542; _gid=GA1.2.1497562578.1610503542; "
                  "cookie_session=!AnxZS989I2WWEppONIhq3dHOsu/4VyPMB2uUQ7VhQ58NbigvNqrV3gdJ3wNP/qYFl3l5MCbT0vDDeP"
                  "+C3j5QyQ8/JwL1WYLBgiBYr59v "
    }
    r = requests.get('http://web.mta.info/developers/turnstile.html', headers)
    r.raise_for_status()
    html = r.text
    soup = BeautifulSoup(html, "html5lib")
    result = ""
    for k in soup.find_all('a'):
        if str(k.string).endswith("2013"):
            # all<a> in 2013
            url = k["href"]
            r2 = requests.get("http://web.mta.info/developers/" + url, headers)
            r2.raise_for_status()
            result += r2.text
    # do some os
    print(result)

Answer 2

您知道所有这些文件的内容有点……庞大吗？
这里有一个没有外部库的 python3 解决方案，使用正则表达式查找链接：

from urllib import request
import re
import os

strings = ['2013', '2014']
output = 'huge.txt'

my_url = 'http://web.mta.info/developers/turnstile.html'
path, page = os.path.split(my_url)
print("path:", path, "page:", page)

html = request.urlopen(my_url).read().decode("utf8")
urls = []
for string in strings:
  urls += [ u for u in re.findall(r'<a href="([^"]+)">([^<]+)</a>', html)
    if u[1].find(string) >= 0 ]

print("links found:", len(urls))
open(output,"wt").write("")

for url in urls:
  #link = os.path.join(path, url[0])
  link = path + "/" + url[0]
  print ("  link:", link, "  name:", url[1])
  open(output, "at").write ( request.urlopen(link).read().decode("utf8") )

Python - 从 html 网络 url 写入指定年份的所有文本文件内容

Python - Writing all text file contents for specified years from a html web url

url

urllib