具体报错是什么？

具体报错是什么？

npm ERR! code 1
npm ERR! path E:\vue_project\vue2-elm\node_modules_node-sass@4.14.1@node-sass
npm ERR! command failed
npm ERR! command C:\WINDOWS\system32\cmd.exe /d /s /c node scripts/build.js
npm ERR! Building: E:\NODEJS\node.exe E:\vue_project\vue2-elm\node_modules_node-gyp@3.8.0@node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
npm ERR! gyp info it worked if it ends with ok
npm ERR! gyp verb cli [
npm ERR! gyp verb cli 'E:\NODEJS\node.exe',
npm ERR! gyp verb cli 'E:\vue_project\vue2-elm\node_modules_node-gyp@3.8.0@node-gyp\bin\node-gyp.js',
npm ERR! gyp verb cli 'rebuild',
npm ERR! gyp verb cli '--verbose',
npm ERR! gyp verb cli '--libsass_ext=',
npm ERR! gyp verb cli '--libsass_cflags=',
npm ERR! gyp verb cli '--libsass_ldflags=',
npm ERR! gyp verb cli '--libsass_library='
npm ERR! gyp verb cli ]
npm ERR! gyp info using node-gyp@3.8.0
npm ERR! gyp info using node@16.2.0 | win32 | x64
npm ERR! gyp verb command rebuild []
npm ERR! gyp verb command clean []
npm ERR! gyp verb clean removing "build" directory
npm ERR! gyp verb command configure []
npm ERR! gyp verb check python checking for Python executable "python2" in the PATH
npm ERR! gyp verb which failed Error: not found: python2
npm ERR! gyp verb which failed at getNotFoundError (E:\vue_project\vue2-elm\node_modules_which@1.3.1@which\which.js:13:12)
npm ERR! gyp verb which failed at F (E:\vue_project\vue2-elm\node_modules_which@1.3.1@which\which.js:68:19)
npm ERR! gyp verb which failed at E (E:\vue_project\vue2-elm\node_modules_which@1.3.1@which\which.js:80:29)
npm ERR! gyp verb which failed at E:\vue_project\vue2-elm\node_modules_which@1.3.1@which\which.js:89:16
npm ERR! gyp verb which failed at E:\vue_project\vue2-elm\node_modules_isexe@2.0.0@isexe\index.js:42:5
npm ERR! gyp verb which failed at E:\vue_project\vue2-elm\node_modules_isexe@2.0.0@isexe\windows.js:36:5
npm ERR! gyp verb which failed at FSReqCallback.oncomplete (node:fs:194:21)
npm ERR! gyp verb which failed python2 Error: not found: python2
npm ERR! gyp verb which failed at getNotFoundError (E:\vue_project\vue2-elm\node_modules_which@1.3.1@which\which.js:13:12)
npm ERR! gyp verb which failed at F (E:\vue_project\vue2-elm\node_modules_which@1.3.1@which\which.js:68:19)
npm ERR! gyp verb which failed at E (E:\vue_project\vue2-elm\node_modules_which@1.3.1@which\which.js:80:29)
npm ERR! gyp verb which failed at E:\vue_project\vue2-elm\node_modules_which@1.3.1@which\which.js:89:16
npm ERR! gyp verb which failed at E:\vue_project\vue2-elm\node_modules_isexe@2.0.0@isexe\index.js:42:5
npm ERR! gyp verb which failed at E:\vue_project\vue2-elm\node_modules_isexe@2.0.0@isexe\windows.js:36:5
npm ERR! gyp verb which failed at FSReqCallback.oncomplete (node:fs:194:21) {
npm ERR! gyp verb which failed code: 'ENOENT'
npm ERR! gyp verb which failed }
npm ERR! gyp verb check python checking for Python executable "python" in the PATH
npm ERR! gyp verb which succeeded python C:\Python39\python.EXE
npm ERR! gyp ERR! configure error
npm ERR! gyp ERR! stack Error: Command failed: C:\Python39\python.EXE -c import sys; print "%s.%s.%s" % sys.version_info[:3];
npm ERR! gyp ERR! stack File "", line 1
npm ERR! gyp ERR! stack import sys; print "%s.%s.%s" % sys.version_info[:3];
npm ERR! gyp ERR! stack ^
npm ERR! gyp ERR! stack SyntaxError: invalid syntax
npm ERR! gyp ERR! stack
npm ERR! gyp ERR! stack at ChildProcess.exithandler (node:child_process:326:12)
npm ERR! gyp ERR! stack at ChildProcess.emit (node:events:365:28)
npm ERR! gyp ERR! stack at maybeClose (node:internal/child_process:1067:16)
npm ERR! gyp ERR! stack at Process.ChildProcess._handle.onexit (node:internal/child_process:301:5)
npm ERR! gyp ERR! System Windows_NT 10.0.19042
npm ERR! gyp ERR! command "E:\NODEJS\node.exe" "E:\vue_project\vue2-elm\node_modules_node-gyp@3.8.0@node-gyp\bin\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
npm ERR! gyp ERR! cwd E:\vue_project\vue2-elm\node_modules_node-sass@4.14.1@node-sass
npm ERR! gyp ERR! node -v v16.2.0
npm ERR! gyp ERR! node-gyp -v v3.8.0
npm ERR! gyp ERR! not ok
npm ERR! Build failed with error code: 1

node-sass 安装失败，这是很常见的问题，可以搜一下解决方式

今天也是出现了这个问题，网上的各种都是试了试，包括镜像等方法，最终发现是node 的版本过高，从V16 降至 v12 后，cnpm i ，安装依赖完美解决

我也是更新到node12,然后mac安装依赖成功,项目成功启动

我用的node14，然后yarn install也成功了，上网搜了这个node-sass对应node版本，node14以下都可以成功。