npm WARN prefer global node-gyp@3.6.0 should be installed with -g

> node-sass@4.5.2 install D:\github\VueBlog\node_modules\node-sass
> node scripts/install.js

Downloading binary from https://github.com/sass/node-sass/releases/download/v4.5.2/win32-x64-48_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v4.5.2/win32-x64-48_binding.node":

connect ETIMEDOUT 54.231.72.27:443

Timed out whilst downloading the prebuilt binary

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@4.5.2 postinstall D:\github\VueBlog\node_modules\node-sass
> node scripts/build.js

Building: E:\软件\node.js\node.exe D:\github\VueBlog\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 [ 'E:\软件\node.js\node.exe',
gyp verb cli   'D:\github\VueBlog\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@3.6.0
gyp info using node@6.9.4 | 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:\github\VueBlog\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\github\VueBlog\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\github\VueBlog\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\github\VueBlog\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\github\VueBlog\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\github\VueBlog\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:123:15)
gyp verb `which` failed  python2 { Error: not found: python2
gyp verb `which` failed     at getNotFoundError (D:\github\VueBlog\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\github\VueBlog\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\github\VueBlog\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\github\VueBlog\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\github\VueBlog\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\github\VueBlog\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:123:15) 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:\github\VueBlog\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\github\VueBlog\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\github\VueBlog\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\github\VueBlog\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\github\VueBlog\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\github\VueBlog\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:123:15)
gyp verb `which` failed  python { Error: not found: python
gyp verb `which` failed     at getNotFoundError (D:\github\VueBlog\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\github\VueBlog\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\github\VueBlog\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\github\VueBlog\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\github\VueBlog\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\github\VueBlog\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:123:15) 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 Object.failNoPython (D:\github\VueBlog\node_modules\node-gyp\lib\configure.js:482:19)
gyp ERR! stack     at Object.<anonymous> (D:\github\VueBlog\node_modules\node-gyp\lib\configure.js:508:16)
gyp ERR! stack     at D:\github\VueBlog\node_modules\graceful-fs\polyfills.js:284:29
gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:123:15)
gyp ERR! System Windows_NT 10.0.14393
gyp ERR! command "E:\软件\node.js\node.exe" "D:\github\VueBlog\node_modules\node-gyp\bin\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd D:\github\VueBlog\node_modules\node-sass
gyp ERR! node -v v6.9.4
gyp ERR! node-gyp -v v3.6.0
gyp ERR! not ok