错误信息：

......

gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:152:21) code: 'ENOENT' }
gyp verb could not find "python2.7". guessing location
gyp verb ensuring that file exists: C:\Python27\python.exe
gyp ERR! configure error
gyp ERR! stack Error: Command failed: C:\Python27\python.exe -c import platform; print(platform.python_version());
gyp ERR! stack
gyp ERR! stack     at ChildProcess.exithandler (child_process.js:275:12)
gyp ERR! stack     at emitTwo (events.js:126:13)
gyp ERR! stack     at ChildProcess.emit (events.js:214:7)
gyp ERR! stack     at maybeClose (internal/child_process.js:925:16)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:209:5)
gyp ERR! System Windows_NT 10.0.17134
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "D:\\project\\eyeshot\\project\\node_modules\\ionic\\node_modules\\ionic-app-lib\\node_modules\\node-sass\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd D:\project\eyeshot\project\node_modules\ionic\node_modules\ionic-app-lib\node_modules\node-sass
gyp ERR! node -v v8.11.3
gyp ERR! node-gyp -v v3.3.1
gyp ERR! not ok

解决办法：

参考以下文章：https://github.com/nodejs/node-gyp

npm install gulp-load-plugins --save