Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser

Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser

解决:   pip install lxml 报错告诉我们缺少lxml这个扩展

[[email protected] fei]# pip  install lxml
Collecting lxml
  Downloading http://mirrors.aliyun.com/pypi/packages/66/ed/01d1d2c9b318eb71d2eebfb77e80232ddae2389f13b52d4754fd3b16a7df/lxml-4.1.1-cp35-cp35m-manylinux1_x86_64.whl (5.5MB)
    100% |????????????????????????????????| 5.5MB 55.8MB/s 
Installing collected packages: lxml
Successfully installed lxml-4.1.1