从表美汤中提取内容

Question

我一直在尝试提取网站上表格中的内容。

descriptions = []
sources = []
values = []

site = 'https://www.eia.gov/todayinenergy/prices.php' #address of the site 
driver = webdriver.Chrome(executable_path=r"chromedriver.exe")
driver.execute_script("document.body.style.zoom='100%'") 
driver.get(site)

soup_1 = bs(driver.page_source, 'lxml') #clean up the site using beautiful soup
tables = soup_1.find_all('tbody') #script of interest
print(len(tables))  #count the scripts 


for table in tables:
    rows = table.find_all('tr')
    print(len(rows))
    for row in rows:
        description = row.find('td', class_='s1')
        descriptions.append(descri_clean)

        source = row.find('td', class_='s2')
        sources.append(source_clean)

        value = row.find('td', class_='d1') #find the row that gives the data
        values.append(value_clean) #compile it all together 

driver.close()

我一直在尝试从表格中获取干净的文本，但是提取的数据看起来像这样。

<td class="s1" rowspan="3">Crude Oil<br/> ($/barrel)</td>

虽然我想要类似“原油（$/桶）”之类的东西

当我尝试时

description = row.find('td', class_='s1').text.renderContents()
descriptions.append(descri_clean)

错误出现了

AttributeError: 'NoneType' object has no attribute 'renderContents'

Answer 1

您可以只使用请求。在循环表行时，您可以通过对某些类属性的预期值进行字符串匹配来过滤掉您的值。我将两个感兴趣的表设置为单独的变量，这些变量是这些表中行的列表。页面上的每个表格都有自己独特的类别标识符，用于表格编号，例如t1，t2 ......

from bs4 import BeautifulSoup as bs
import requests

r = requests.get('https://www.eia.gov/todayinenergy/prices.php')
soup = bs(r.content, 'lxml')
table1 = soup.select('.t1 tr')
table2 = soup.select('.t2 tr')
for item in table1:
    if 'Crude Oil ($/barrel) - Nymex Apr' in item.text:
        rowInfo = [td.text for td in item.select('td')]
        print(rowInfo)
    elif 'Ethanol ($/gallon) - CBOT Apr' in item.text:
        rowInfo = [td.text for td in item.select('td')]
        print(rowInfo)

for item in table2:
    if len(item.select('td')) == 4:
        header = item.select_one('td.s1').text
    if item.select_one('td.s2'):
        if item.select_one('td.s2').text in ['WTI','Brent','Louisiana Light','Los Angeles'] and header in ['Crude Oil ($/barrel)','Gasoline (RBOB) ($/gallon)']:
            rowInfo = [td.text for td in item.select('td')]
            print(rowInfo)