wget https://www.crummy.com/software/BeautifulSoup/bs4/download/4.5/beautifulsoup4-4.5.1.tar.gz
tar xvzf beautifulsoup4-4.5.1.tar.gz
cd beautifulsoup4-4.5.1
python2.7 setup.py install
yum install python-requests 【此路不一样,装完没反应】
只能装pip后再安装所需第三方库html
wget https://bootstrap.pypa.io/get-pip.py python get-pip.py pip install requests
pip install lxml