使用 BeautifulSoup 从 URL 抓取数据并将其保存到 csv

Question

嗯，我是 Python 的 BS 新手。我写了一个代码来抓取 HTML 并将我需要的所有数据保存在 csv 文件中。 ALL_NUMBERS 文件中的值代入 URL 中，因此得到大量 URL。

代码如下：

import requests
from bs4 import BeautifulSoup

#--READ NAMES--
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.2)\
    AppleWebKit/537.36 (KHTML, like Gecko)\
    Chrome/63.0.3239.84 Safari/537.36',
    'Accept-Language': 'ru-RU,ru;q=0.9,en-US;q=0.8,en;q=0.7'}
all_names = [] # TO KEEP ALL NAMES IN MEMORY

with open('ALL_NUMBERS.txt', 'r') as text_file:
    for line in text_file:
        line = line.strip()
        all_names.append(line)

url_template = 'https://www.investing.com/news/stock-market-news/learjet-the-private-plane-synonymous-with-the-jetset-nears-end-of-runway-{}'

all_urls = [] # TO KEEP ALL URLs IN MEMORY

with open("url_requests.txt", "w") as text_file:
    for name in all_names:
        url = url_template.format(name)
        print('url:', url)
        all_urls.append(url)
        text_file.write(url + "\n")

# --- read data ---

for name, url in zip(all_names, all_urls):
    # print('name:', name)
    # print('url:', url)
    r1 = requests.get(url, headers = headers)

page = r1.content
soup = BeautifulSoup(page, 'html5lib')
results = soup.find('div', class_= 'WYSIWYG articlePage')
para = results.findAll("p")
results_2 = soup.find('div', class_= 'contentSectionDetails')
para_2 = results_2.findAll ("span")
#for n in results_2:
    #print n.find('p').text

#cont = soup.select_one("div.contentSectionDetails")
#ram = cont.select_one("span")
#[x.extract() for x in ram.select_one('span')]


with open('stock_market_news_' + name + '.csv', 'w') as text_file:
    text_file.write(str(para))
    text_file.write(str(para_2))

效果很好，但只有一个 URL。我想将每个 URL 的 para 和 para_2 保存在一个 csv 文件中。也就是说，每行中每个 URL 保存两个参数：

Text	Time
`para` From URL(1)	`para_2` From URL(1)
`para` From URL(2)	`para_2` From URL(2)
...	...

不幸的是，在我的案例中，我不知道如何更好地处理很多 URL。

Answer 1

您可以将所有参数存储在一个列表中，然后将结果保存在您的文件中：

import csv

# ...

# --- read data ---

params = []
for name, url in zip(all_names, all_urls):
    r1 = requests.get(url, headers = headers)
    page = r1.content
    soup = BeautifulSoup(page, 'html5lib')
    results = soup.find('div', class_= 'WYSIWYG articlePage')
    para = '\n'.join([r.text for r in results.findAll("p")])
    results_2 = soup.find('div', class_= 'contentSectionDetails')
    para_2 = results_2.findAll("span")[0].text
    params.append([str(para), str(para_2)])

with open('stock_market_news_' + name + '.csv', 'w') as text_file:
    text_file.write("Text;Time\n")
    wr = csv.writer(f, quoting=csv.QUOTE_ALL)
    wr.writerow(['Text', 'Time'])
    wr.writerows(params)

这个答案能解决您的问题吗？

祝你有愉快的一天！

使用 BeautifulSoup 从 URL 抓取数据并将其保存到 csv

Scraping and save data from URLs to csv using BeautifulSoup

html

csv

beautifulsoup

python-3.x

export-to-csv