linux安装python3环境

手动下载：链接: python官网.
其他方式下载：略

tar -zxvf Python-3.7.3.tgz
cd Python3.7.3/
sudo  ./configure --prefix=/usr/local/python37
sudo make
sudo make install

# 创建软连接
sudo ln -s /usr/local/python37/bin/python3.7.3  /usr/local/bin/python
sudo ln -s /usr/local/python37/bin/pip3.7 /usr/local/bin/pip

附加命令：

# 查看python版本
python --version
python -V
# 运行python
python
# 退出python
exit();

临时使用pip清华源：

pip install numpy -i https://pypi.tuna.tsinghua.edu.cn/simple