linux通过conda安装python包

step1.选择python版本创建小环境

export PATH=/home/appl/anaconda3/bin:$PATH

conda create -n python2.7 python=2.7

source activate python2.7

step2.在anaconda网站（https://anaconda.org/）上找所需包的安装命令

conda install -c conda-forge numpy

step3.调用

export PATH=/home/appl/anaconda3/envs/python2.7/bin/:$PATH