> node-sass@4.7.2 install D:\hj-program\mcstatic\node_modules\node-sass
> node scripts/install.js
Downloading binary from https://github.com/sass/node-sass/releases/download/v4.7.2/win32-x64-64_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v4.7.2/win32-x64-64_binding.node":
HTTP error 404 Not Found
Hint: If github.com is not accessible in your location
      try setting a proxy via HTTP_PROXY, e.g.
      export HTTP_PROXY=http://example.com:1234
or configure npm proxy via
      npm config set proxy http://example.com:8080
> node-sass@4.7.2 postinstall D:\hj-program\mcstatic\node_modules\node-sass
> node scripts/build.js
Building: C:\Program Files\nodejs\node.exe D:\hj-program\mcstatic\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
gyp info it worked if it ends with ok
gyp verb cli [ 'C:\\Program Files\\nodejs\\node.exe',
gyp verb cli   'D:\\hj-program\\mcstatic\\node_modules\\node-gyp\\bin\\node-gyp.js',
gyp verb cli   'rebuild',
gyp verb cli   '--verbose',
gyp verb cli   '--libsass_ext=',
gyp verb cli   '--libsass_cflags=',
gyp verb cli   '--libsass_ldflags=',
gyp verb cli   '--libsass_library=' ]
gyp info using node-gyp@3.8.0
gyp info using node@10.16.0 | win32 | x64
gyp verb command rebuild []
gyp verb command clean []
gyp verb clean removing "build" directory
gyp verb command configure []
gyp verb check python checking for Python executable "python2" in the PATH
gyp verb `which` failed Error: not found: python2
gyp verb `which` failed     at getNotFoundError (D:\hj-program\mcstatic\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\hj-program\mcstatic\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\hj-program\mcstatic\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:153:21)
gyp verb `which` failed  python2 { Error: not found: python2
gyp verb `which` failed     at getNotFoundError (D:\hj-program\mcstatic\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\hj-program\mcstatic\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\hj-program\mcstatic\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:153:21)
gyp verb `which` failed   stack:
gyp verb `which` failed    'Error: not found: python2\n    at getNotFoundError (D:\\hj-program\\mcstatic\\node_modules\\which\\which.js:13:12)\n    at F (D:\\hj-program\\mcstatic\\node_modules\\which\\which.js:68:19)\n    at E (D:\\hj-program\\mcstatic\\node_modules\\which\\which.js:80:29)\n    at D:\\hj-program\\mcstatic\\node_modules\\which\\which.js:89:16\n    at D:\\hj-program\\mcstatic\\node_modules\\isexe\\index.js:42:5\n    at D:\\hj-program\\mcstatic\\node_modules\\isexe\\windows.js:36:5\n    at FSReqWrap.oncomplete (fs.js:153:21)',
gyp verb `which` failed   code: 'ENOENT' }
gyp verb check python checking for Python executable "python" in the PATH
gyp verb `which` failed Error: not found: python
gyp verb `which` failed     at getNotFoundError (D:\hj-program\mcstatic\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\hj-program\mcstatic\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\hj-program\mcstatic\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:153:21)
gyp verb `which` failed  python { Error: not found: python
gyp verb `which` failed     at getNotFoundError (D:\hj-program\mcstatic\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\hj-program\mcstatic\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\hj-program\mcstatic\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\hj-program\mcstatic\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:153:21)
gyp verb `which` failed   stack:
gyp verb `which` failed    'Error: not found: python\n    at getNotFoundError (D:\\hj-program\\mcstatic\\node_modules\\which\\which.js:13:12)\n    at F (D:\\hj-program\\mcstatic\\node_modules\\which\\which.js:68:19)\n    at E (D:\\hj-program\\mcstatic\\node_modules\\which\\which.js:80:29)\n    at D:\\hj-program\\mcstatic\\node_modules\\which\\which.js:89:16\n    at D:\\hj-program\\mcstatic\\node_modules\\isexe\\index.js:42:5\n    at D:\\hj-program\\mcstatic\\node_modules\\isexe\\windows.js:36:5\n    at FSReqWrap.oncomplete (fs.js:153:21)',
gyp verb `which` failed   code: 'ENOENT' }
gyp verb could not find "python". checking python launcher
gyp verb could not find "python". guessing location
gyp verb ensuring that file exists: C:\Python27\python.exe
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 (D:\hj-program\mcstatic\node_modules\node-gyp\lib\configure.js:484:19)
gyp ERR! stack     at PythonFinder.<anonymous> (D:\hj-program\mcstatic\node_modules\node-gyp\lib\configure.js:509:16)
gyp ERR! stack     at callback (D:\hj-program\mcstatic\node_modules\graceful-fs\polyfills.js:289:20)
gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:153:21)
gyp ERR! System Windows_NT 10.0.17763
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "D:\\hj-program\\mcstatic\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd D:\hj-program\mcstatic\node_modules\node-sass
gyp ERR! node -v v10.16.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
Build failed with error code: 1
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.7.2 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.7.2 postinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\niyuanyuan01\AppData\Roaming\npm-cache\_logs\2019-08-01T03_33_39_918Z-debug.log
可能是window下缺少编译环境，全局安装下面模块
npm install -g node-gyp
安装之后还是发现出错，再安装window自己的构建工具

注：下面安装需要在window下powerShell 下以管理员权限执行
install --global --production windows-build-tools
安装完成之后，删除之前安装的 node_modules ，然后再在你的项目目录下执行
npm i node-sass