我看过类似的帖子，这些帖子与我的案子很接近，但我的结果似乎出乎意料。
import BeautifulSoup
import re
soup = BeautifulSoup.BeautifulSoup(<html page of interest>)
if (soup.find_all("td", attrs= {"class": "FilterElement"}, text= re.compile("HERE IS TEXT I AM LOOKING FOR")) is None):
print('There was no entry')
else:
print(soup.find("td", attrs= {"class": "FilterElement"}, text= re.compile("HERE IS THE TEXT I AM LOOKING FOR")))
我明显过滤掉了实际的HTML页面，以及正则表达式中的文本。其余的完全一样。我收到以下错误：
Traceback (most recent call last):
File "/Users/appa/src/workspace/web_forms/WebForms/src/root/queryForms.py", line 51, in <module>
LoopThroughDays(form, id, trailer)
File "/Users/appa/src/workspace/web_forms/WebForms/src/root/queryForms.py", line 33, in LoopThroughDays
if (soup.find_all("td", attrs= {"class": "FilterElement"}, text= re.compile("HERE IS THE TEXT I AM LOOKING FOR")) is None):
TypeError: 'NoneType' object is not callable
我知道文本有时会丢失。但是我认为我设置if语句的方式正好能够捕获它何时丢失，因此NoneType。
提前感谢您的帮助！
答案 0 :(得分：2)
看起来这只是一个错字。它应该是soup.findAll而不是soup.find_all。我试过运行它，它适用于校正。所以完整的程序应该是：
import BeautifulSoup
import re
soup = BeautifulSoup.BeautifulSoup(<html page of interest>)
if (soup.findAll("td", attrs= {"class": "FilterElement"}, text= re.compile("HERE IS TEXT I AM LOOKING FOR")) is None):
print('There was no entry')
else:
print(soup.find("td", attrs= {"class": "FilterElement"}, text= re.compile("HERE IS THE TEXT I AM LOOKING FOR")))<html page of interest>