用下列代码进行网页爬取时报错
import lxml.html,requests
url ='https://www.python.org/dev/peps/pep-0020/'
xpath ='//*[@id="the-zen-of-python"]/pre/text()'
res = requests.get(url)
ht = lxml.html.fromstring(res.text)
text = ht.xpath(xpath)
print('Hello,\n'+''.join(text))
错误提示:RequestsDependencyWarning: urllib3 (2.0.0a3) or chardet (None)/charset_normalizer (2.0.12) doesn't match a supported version!
warnings.warn(