python 3.5.2安装
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apt-get -y install build-essential checkinstall
apt-get install -y libreadline-gplv2-dev libncursesw5-dev libssl-dev libsqlite3-dev tk-dev libgdbm-dev libc6-dev libbz2-dev

wget https://www.python.org/ftp/python/3.5.2/Python-3.5.2.tgz
tar xzf Python-3.5.2.tgz
cd Python-3.5.2
./configure
make altinstall
cd /usr/bin/
mv python python2.7.12
ln -s /usr/local/bin/python3.5 python
python -V

pip3
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默认安装Python3.5.2，就会安装pip3，只是名字，我们需要修改下：ln -s /usr/local/bin/pip3.5 /usr/local/bin/pip3