conda安装python2.7的虚拟环境

2.7最终版本2.7.18

#2.7
conda create -n python27 python=2.7.18

#3.9
conda create -n pytorch39 python=3.9.7

#3.7.11
conda create -n py3 python=3.7.11

激活2.7环境

conda activate python27