安装前系统设置
1、防火墙设置
centos7.0默认防火墙为firewalld
停止firewall
systemctl stop firewalld.service
禁止firewall开机启动
systemctl disable firewalld.service
查看默认防火墙状态：
firewall-cmd --state
2、修改selinux
setenforce 0
vi /etc/selinux/config
将SELINUX=enforcing改为：SELINUX=disabled
二、安装Python3
CentOS7默认安装了python2.7，当需要使用python3的时候，可以手动下载Python源码后编译安装。
1.安装python3.5可能使用的依赖
yum -y install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel
2.下载python
cd /opt/
scp 10.32.35.100:/data/share/Python-3.5.0.tgz /opt/
3.解压下载好的压缩包
tar -zxvf Python-3.5.0.tgz
4.配置编译
mkdir /usr/local/python3
cd Python-3.5.0
./configure --prefix=/usr/local/python3
make
make install
5.备份旧版本python，链接新版本python
cd /usr/bin/
mv python python.bak
ln -s /usr/local/python3/bin/python3 /usr/bin/python
python -V
6.修改yum配置文件
vi /usr/bin/yum
将第一行指定的python版本改为python2.7(#!/usr/bin/python 改为 #!/usr/bin/python2.7)
三、安装BeautifulSoup4
scp 10.32.35.100:/data/share/beautifulsoup4-4.6.0.tar.gz /opt/
tar -zxvf beautifulsoup4-4.6.0.tar.gz
cd beautifulsoup4-4.6.0
python setup.py install