FeatureNotFound( bs4.FeatureNotFound: Couldn‘t find a tree builder with the features you requested:

问题描述： 代码如下：

代码语言：javascript复制

from bs4 import BeautifulSoup

# 在此实现代码
def fetch_text(html):
    soup = BeautifulSoup(html, 'lxml')
    result = soup.text
    return result

执行到这行：BeautifulSoup(html, ‘lxml’)，报如下错误： in init raise FeatureNotFound( bs4.FeatureNotFound: Couldn’t find a tree builder with the features you requested: lxml. Do you need to install a parser library?

执行如下命令，下载安装lxml:

代码语言：javascript复制

pip install lxml

beautifulsoup builder init lxml tree

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