step1:
yum -y install gcc
yum install zlib zlib-develstep2: cd /usr/bin/ mv python python.bak
step3:下载python3.6.3,解压并进入目录执行执行 ./configure -prefix=/usr/local/python/python3 ; make ; makeinstall
step4:执行 ln -s /usr/local/python/python3/bin/python3 /usr/bin/python
ln -s /usr/local/python/python3/bin/pip3 /usr/bin/pip3