npm install throws errors

hi ,
there are some throwed errors when i try to execute the "npm install ".

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 (F:\Stage\blur-admin-master\node_modules\node-gyp\lib\configure.js:483:19)
gyp ERR! stack at PythonFinder. (F:\Stage\blur-admin-master\node_modules\node-gyp\lib\configure.js:508:16)
gyp ERR! stack
at F:\Stage\blur-admin-master\node_modules\graceful-fs\polyfills.js:284:29
gyp ERR! stack
at FSReqWrap.oncomplete (fs.js:153:21)
gyp ERR! System Windows_NT 10.0.10586
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "F:\\Stage\\blur-admin-master\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd F:\Stage\blur-admin-master\node_modules\node-sass gyp ERR! node -v v8.6.0
gyp ERR! node-gyp -v v3.6.2
gyp ERR! not ok
Build failed with error code: 1
npm WARN blur_admin@1.3.1 No repository field.
npm WARN blur_admin@1.3.1 No license field.
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@3.13.1 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR! npm ERR! Failed at the node-sass@3.13.1 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\mustapha\AppData\Roaming\npm-cache\_logs\2017-10-02T15_04_38_984Z-debug.log

I install gyp but the erros still throwed
npm install -g node-gyp