linux下yum安装python3
yum install python34 -y
python3 --version
wget --no-check-certificate https://bootstrap.pypa.io/get-pip.py
python3 get-pip.py
pip3 -V
yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc make libffi-devel
mv /usr/bin/python /usr/bin/python.bak
ln -s /usr/local/bin/python3 /usr/bin/python
find / -name 'pip3'找到pip3的位置
mv /usr/bin/pip /usr/bin/pip.bak
ln -s /usr/local/bin/pip3 /usr/bin/pip
vi /usr/bin/yum
#!/usr/bin/python2.6