https://www.anaconda.com/download/ https://www.python.org/downloads/windows/ 下载python3.0
PATH设置安装路径 (环境)
同时安装py2.0和py3.0(安装的py3命名为python3) 分开执行命令 python -m pip install (下载) python -m pip install --upgrade pip(下载安装pip) ———————————————————————————— python3 -m pip install python3 -m pip install --upgrade pip(3.0下载安装pip) ————————————————————————————
python -m pip list (查看版本pip) python3 -m pip list(查看3.0版本) ————————————————————————————