CentOS7安装python3与python2共存

tar xf Python-3.8.10.tgz
cd Python-3.8.10
./configure --prefix=/usr/local/python3 --enable-optimizations
make -j 4 && make install

vim /etc/profile.d/python.sh
	export PATH=$PATH:/usr/local/python3/bin

source /etc/profile.d/python.sh

ln -s /usr/local/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3
pip3 install --upgrade pip

pip install ipython		# python2安装ipython
pip3 install ipython		# python3安装ipython

ln -s /usr/local/python3/bin/ipython /usr/bin/ipython3