Ubuntu中在用npm install 时报错

gyp WARN download NVM_NODEJS_ORG_MIRROR is deprecated and will be removed in node-gyp v4, please use NODEJS_ORG_MIRROR
gyp ERR! configure error 
gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
gyp ERR! stack     at PythonFinder.failNoPython (/home/nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:484:19)
gyp ERR! stack     at PythonFinder.<anonymous> (/home/nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:406:16)
gyp ERR! stack     at F (/home/nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/which/which.js:68:16)
gyp ERR! stack     at E (/home/nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/which/which.js:80:29)
gyp ERR! stack     at /home/nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/which/which.js:89:16
gyp ERR! stack     at /home/nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/isexe/index.js:42:5
gyp ERR! stack     at /home/nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/isexe/mode.js:8:5
gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:153:21)
gyp ERR! System Linux 4.15.0-65-generic
gyp ERR! command "/home/nvm/versions/node/v10.16.3/bin/node" "/home/nvm/versions/node/v10.16.3/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /www/express-ffmpeg/node_modules/canvas
gyp ERR! node -v v10.16.3
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok 

解决办法是安装python

sudo apt install python2.7
sudo npm config set python /usr/bin/python2.7