CentOS 7 升级Python2.7到Pyton3.6

1：安装zlib
yum -y install zlib zlib-devel

2：下载，编译安装python3.6
mkdir /usr/local/python3
wget --no-check-certificate https://www.python.org/ftp/python/3.6.0/Python-3.6.0.tgz
tar -xzvf Python-3.6.0.tgz
cd Python-3.6.0
./configure --prefix=/usr/local/python3
make && make install

3：创建软连接
mv /usr/bin/python /usr/bin/python.bak
ln -s /usr/local/python3/bin/python3 /usr/bin/python
4：修改yum不能用的问题
vim /usr/bin/yum
#!/usr/bin/python --> #!/usr/bin/python2.7
vim /usr/libexec/urlgrabber-ext-down
#!/usr/bin/python --> #!/usr/bin/python2.7

5：安装pip
yum -y install epel-release
yum -y install python-pip
yum clean all