Python regex AttributeError:"NoneType"对象没有属性"group" [英] Python regex AttributeError: 'NoneType' object has no attribute 'group'

问题描述

我使用正则表达式从具有selenium.webDriver的网页上的搜索框中检索某些内容.

I use Regex to retrieve certain content from a search box on a webpage with selenium.webDriver.

searchbox = driver.find_element_by_class_name("searchbox")
searchbox_result = re.match(r"^.*(?=(\())", searchbox).group()

只要搜索框返回与正则表达式匹配的结果，代码就起作用.但是，如果搜索框用字符串"No results"答复，则会出现错误:

The code works as long as the search box returns results that match the Regex. But if the search box replies with the string "No results" I get error:

AttributeError:'NoneType'对象没有属性'group'

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

如何使脚本处理"No results"情况?

推荐答案

我设法弄清楚了这个解决方案，它与在搜索框回复为"No results"的情况下忽略group()有关，因此没有匹配正则表达式.

I managed to figure out this solution, it had to do with neglecting group() for the situation where the searchbox reply is "No results" and thus doesn't match the Regex.

try:
    searchbox_result = re.match("^.*(?=(\())", searchbox.group()
except AttributeError:
    searchbox_result = re.match("^.*(?=(\())", searchbox)

或简单地:

try:
    searchbox_result = re.match("^.*(?=(\())", searchbox.group()
except:
    searchbox_result = None

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