AttributeError：'ResultSet'對象沒有屬性'previousSibling'BS4

Question

爲一組特定的'td'標記和裏面的文本刮表。要篩選我正在針對特定的'img'標記並嘗試使用previousSibling調用來獲得我想要的'td'。我試過previousSibling，previous_sibling，previous並不斷收到錯誤：

'ResultSet' object has no attribute 'previousSibling'

任何幫助，將不勝感激。
到目前爲止，這是我的代碼。

from urllib2 import urlopen 
import requests 
from bs4 import BeautifulSoup 
base_url = 'http://www.myfxbook.com/forex-economic-calendar' 
response = urlopen(base_url) 
html = response 
soup = BeautifulSoup(html.read().decode('utf-8'), "lxml") 
table = soup.find('table', attrs={'class': 'table center td30'}) 
is_row = table.findAll('img', attrs={'class': 'sprite sprite-common sprite-high-impact'}).previousSibling('td').text 
print is_row 

Answer 1

您正在搜索的圖片沒有siblings。你想要的（我認爲）是獲得圖像父親以前的兄弟姐妹。

例子：

from bs4 import BeautifulSoup 
import requests 

base_url = 'http://www.myfxbook.com/forex-economic-calendar' 
response = requests.get(base_url) 


soup = BeautifulSoup(response.content.decode('utf-8'), "html.parser") 

table = soup.find('table', attrs={'class': 'table center td30'}) 
is_row = table.findAll('img', attrs={'class': 'sprite sprite-common 
sprite-high-impact'}) 

for row in is_row: 
    print (row.parent.find_previous_sibling("td").get_text(strip=True)) 

，輸出：

Fed's Yellen Speech 
FOMC Member Kashkari Speech 
BOE's Governor Carney speech 
Claimant Count Change 
BOC Rate Statement 
BoC Interest Rate Decision 
Bank of Canada Monetary Policy Report 
BoC Press Conference