正则表达式上的 Python TypeError

Question

这个问题在这里已经有了答案:

TypeError: can't use a string pattern on a bytes-like object in re.findall() (4 个回答)

关闭 4年前.

所以，我有这个代码:

url = 'http://google.com'
linkregex = re.compile('<a\s*href=[\'|"](.*?)[\'"].*?>')
m = urllib.request.urlopen(url)
msg = m.read()
links = linkregex.findall(msg)

然后python返回这个错误:

links = linkregex.findall(msg)
TypeError: can't use a string pattern on a bytes-like object

我做错了什么？

Answer 1

TypeError: can't use a string patternon a bytes-like object

what did i do wrong??

您在字节对象上使用了字符串模式。改用字节模式:

linkregex = re.compile(b'<a\s*href=[\'|"](.*?)[\'"].*?>')
                       ^
            Add the b there, it makes it into a bytes object

(ps:

 >>> from disclaimer include dont_use_regexp_on_html
 "Use BeautifulSoup or lxml instead."

)