将新闻写入CSV文件(Python 3，BeautifulSoup)

Question

我希望 Python3.6 将以下代码的输出写入 csv 中。像这样会很好：每篇文章（它是一个新闻网站）一行，四列有"标题"、"URL"、"类别"[#Politik 等]、"发布于"。

from bs4 import BeautifulSoup
import requests
website = 'http://spiegel.de/schlagzeilen'
r = requests.get(website)
soup = BeautifulSoup((r.content), "lxml")
div = soup.find("div", {"class": "schlagzeilen-content schlagzeilen-overview"})
for a in div.find_all('a', title=True):
    print(a.text, a.find_next_sibling('span').text)
    print(a.get('href'))

为了写到 csv，我已经有了这个...

with open('%s_schlagzeilen.csv' % datetime.datetime.now().strftime('%Y-%m-%d_%H-%M-%S.%f'), 'w', newline='',
              encoding='utf-8') as file:
        w = csv.writer(file, delimiter="|")
        w.writerow([...])

..并且需要知道下一步要做什么。谢谢！！提前！

Answer 1

您可以将

所有所需的提取字段收集到字典列表中，并使用csv.DictWriter写入 CSV 文件：

import csv
import datetime
from bs4 import BeautifulSoup
import requests

website = 'http://spiegel.de/schlagzeilen'
r = requests.get(website)
soup = BeautifulSoup((r.content), "lxml")
articles = []
for a in soup.select(".schlagzeilen-content.schlagzeilen-overview a[title]"):
    category, published_at = a.find_next_sibling(class_="headline-date").get_text().split(",")
    articles.append({
        "Title": a.get_text(),
        "URL": a.get('href'),
        "Category": category.strip(" ()"),
        "PublishedAt": published_at.strip(" ()")
    })
filename = '%s_schlagzeilen.csv' % datetime.datetime.now().strftime('%Y-%m-%d_%H-%M-%S.%f')
with open(filename, 'w', encoding='utf-8') as f:
    writer = csv.DictWriter(f, fieldnames=["Title", "URL", "Category", "PublishedAt"], )
    writer.writeheader()
    writer.writerows(articles)

请注意我们如何定位类别和"发布于" - 我们需要转到下一个同级元素并用逗号拆分文本，去掉多余的括号。