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[英]Reading list of URLs from .csv for scraping with Python, BeautifulSoup, Pandas
[英]BeautifulSoup: Scraping CSV list of URLs
我一直在尝试从不同的 url 下载数据,然后将其保存到csv文件中。
这个想法是从以下位置提取突出显示的数据: https://www.marketwatch.com/investing/stock/MMM/financials/cash-flow
到目前为止,我构建了以下代码:
import pandas as pd
from bs4 import BeautifulSoup
import urllib.request as ur
url_is = 'https://www.marketwatch.com/investing/stock/MMM/financials/cash-flow'
read_data = ur.urlopen(url_is).read()
soup_is=BeautifulSoup(read_data, 'lxml')
row = soup_is.select_one('tr.mainRow>td.rowTitle:contains("Cash Dividends Paid - Total")')
data=[cell.text for cell in row.parent.select('td') if cell.text!='']
df=pd.DataFrame(data)
print(df.T)
我得到一个 output:
到目前为止一切都很好。
现在我的想法是从多个 URL 中提取特定类,从网站中保留相同的标题并将其导出到.csv 。
标签和类保持不变
示例网址:
https://www.marketwatch.com/investing/stock/MMM/financials/cash-flow
https://www.marketwatch.com/investing/stock/aapl/financials/cash-flow
代码(我想尝试两列: 2015 和 2016 )
我编写了以下代码,但给我带来了问题,欢迎任何帮助或建议:
import pandas as pd
from bs4 import BeautifulSoup
import urllib.request as ur
import numpy as np
import requests
links = ['https://www.marketwatch.com/investing/stock/aapl/financials/cash-flow', 'https://www.marketwatch.com/investing/stock/MMM/financials/cash-flow']
container = pd.DataFrame(columns=['Name', 'Name2'])
pos=0
for l in links:
read_data = ur.urlopen(l).read()
soup_is=BeautifulSoup(read_data, 'lxml')
row = soup_is.select_one('tr.mainRow>td.rowTitle:contains("Cash Dividends Paid - Total")')
results=[cell.text for cell in row.parent.select('td') if cell.text!='']
records = []
for result in results:
records = []
Name = result.find('span', attrs={'itemprop':'2015'}).text if result.find('span', attrs={'itemprop':'2015'}) is not None else ''
Name2 = result.find('span', attrs={'itemprop':'2016'}).text if result.find('span', attrs={'itemprop':'2016'}) is not None else ''
records.append(Name)
records.append(Name2)
container.loc[pos] = records
pos+=1
import requests
import pandas as pd
urls = ['https://www.marketwatch.com/investing/stock/aapl/financials/cash-flow',
'https://www.marketwatch.com/investing/stock/MMM/financials/cash-flow']
def main(urls):
with requests.Session() as req:
goal = []
for url in urls:
r = req.get(url)
df = pd.read_html(
r.content, match="Cash Dividends Paid - Total")[0].iloc[[0], 0:3]
goal.append(df)
new = pd.concat(goal)
print(new)
main(urls)
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