gyp verb check python checking for Python executable "python2" in the PATH

在启动vueJs项目时，使用npm install 报以下错误：

npm WARN prefer global [email protected] should be installed with -g

> [email protected] install E:\workspace_vscode\ww\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/win3                                                 2-x64-48_binding.node":

connect ETIMEDOUT 54.231.72.83:443

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

> [email protected] postinstall E:\workspace_vscode\ww\node_modules\node-sass
> node scripts/build.js

Building: D:\nodejs\node.exe E:\workspace_vscode\ww\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_l                                                 dflags= --libsass_library=
gyp info it worked if it ends with ok
gyp verb cli [ 'D:\\nodejs\\node.exe',
gyp verb cli   'E:\\workspace_vscode\\ww\\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 [email protected]
gyp info using [email protected] | 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 (E:\workspace_vscode\ww\ node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (E:\workspace_vscode\ww\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (E:\workspace_vscode\ww\node_modules\which\which.js:80:29)
gyp verb `which` failed     at E:\workspace_vscode\ww\node_modules\which\which.js:89:16
gyp verb `which` failed     at E:\workspace_vscode\ww\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at E:\workspace_vscode\ww\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 (E:\workspace_vscode\ww\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (E:\workspace_vscode\ww\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (E:\workspace_vscode\ww\node_modules\which\which.js:80:29)
gyp verb `which` failed     at E:\workspace_vscode\ww\node_modules\which\which.js:89:16
gyp verb `which` failed     at E:\workspace_vscode\ww\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at E:\workspace_vscode\ww\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` succeeded python D:\Python\python.EXE
gyp verb check python version `D:\Python\python.EXE -c "import platform; print(platform.python_version());"` returned: "3.6.1\r\n"
gyp verb could not find "D:\Python\python.EXE". checking python launcher
gyp verb could not find "D:\Python\python.EXE". 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 "D:\Python\python.EXE", you can set the PYTHON env variable.
gyp ERR! stack     at Object.failNoPython (E:\workspace_vscode\ww\node_modules\node-gyp\lib\configure.js:482:19)
gyp ERR! stack     at Object. (E:\workspace_vscode\ww\node_modules\node-gyp\lib\configure.js:508:16)
gyp ERR! stack     at E:\workspace_vscode\ww\node_modules\graceful-fs\polyfills.js:284:29
gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:123:15)
gyp ERR! System Windows_NT 6.1.7601
gyp ERR! command "D:\\nodejs\\node.exe" "E:\\workspace_vscode\\ww\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--l                                                 ibsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd E:\workspace_vscode\ww\node_modules\node-sass
gyp ERR! node -v v6.9.5
gyp ERR! node-gyp -v v3.6.0
gyp ERR! not ok
Build failed with error code: 1

在 node scripts/install.js 之后发现这么一句话

Cannot download "https://github.com/sass/node-sass/releases/download/v4.5.3/win32-x64-51_binding.node":

在网上下载，如果报错的版本和我的一样，可以用我下载好的文件  点击下载

下载完了之后把它注册成全局环境变量，两种方式：

第一种：直接右键我的电脑--》属性--》高级系统设置--》环境变量--》添加

第二种：set XXX=文件路经--》set SASS_BINARY_PATH=F:\ww\tools\node-sass\win32-x64-46_binding.node

查看环境是否合适：echo %SASS_BINARY_PATH%

如果打印出来您配置好的文件地址那就ok了，

最后再来试试安装：npm i -g node-sass

如果错误是有关  Python , 那就装Python 就能解决。