title: Why am getting, gyp ERR! stack Error: Can't find Python executable "python"?
body: <p>In my project I didn't use of any <code>PYTHON</code>, but am getting <code>gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.</code></p>
  
  <p>Am installing the <code>node_modules</code> using <code>npm i --save</code>.
  recently I update my project so upgrade the <code>node</code>, <code>npm</code> and <code>yarn</code> versions.</p>
  
  <p>Here the versions:</p>
  
  <pre><code>node: 12.4.0
  npm: 6.9.0
  yarn: 1.16.0
  @angular/cli: 8.0.2
  </code></pre>
  
  <p>While am installing <code>node_modules</code> getting the errors:</p>
  
  <pre><code>&gt; node-sass@4.10.0 postinstall 
  D:\kishore\Git_Works\jupiter\node_modules\node-sass
  &gt; node scripts/build.js
  
  Building: C:\Program Files\nodejs\node.exe 
  D:\kishore\Git_Works\jupiter\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 [
  gyp verb cli   'C:\\Program Files\\nodejs\\node.exe',
  gyp verb cli   'D:\\kishore\\Git_Works\\jupiter\\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 verb cli ]
  gyp info using node-gyp@3.8.0
  gyp info using node@12.4.0 | 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:\kishore\Git_Works\jupiter\node_modules\which\which.js:13:12)
  gyp verb `which` failed     at F (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:68:19)
  gyp verb `which` failed     at E (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:80:29)
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\which\which.js:89:16
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\isexe\index.js:42:5
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\isexe\windows.js:36:5
  gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:165:21)
  gyp verb `which` failed  python2 Error: not found: python2
  gyp verb `which` failed     at getNotFoundError (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:13:12)
  gyp verb `which` failed     at F (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:68:19)
  gyp verb `which` failed     at E (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:80:29)
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\which\which.js:89:16
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\isexe\index.js:42:5
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\isexe\windows.js:36:5
  gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:165:21) {
  gyp verb `which` failed   stack: 'Error: not found: python2\n    at getNotFoundError ' +
  gyp verb `which` failed     '(D:\\kishore\\Git_Works\\jupiter\\node_modules\\which\\which.js:13:12)\n' +
  gyp verb `which` failed     '    at F ' +
  gyp verb `which` failed     '(D:\\kishore\\Git_Works\\jupiter\\node_modules\\which\\which.js:68:19)\n' +
  gyp verb `which` failed     '    at E ' +
  gyp verb `which` failed     '(D:\\kishore\\Git_Works\\jupiter\\node_modules\\which\\which.js:80:29)\n' +
  gyp verb `which` failed     '    at ' +
  gyp verb `which` failed     'D:\\kishore\\Git_Works\\jupiter\\node_modules\\which\\which.js:89:16\n' +
  gyp verb `which` failed     '    at ' +
  gyp verb `which` failed     'D:\\kishore\\Git_Works\\jupiter\\node_modules\\isexe\\index.js:42:5\n ' +
  gyp verb `which` failed     '   at ' +
  gyp verb `which` failed     'D:\\kishore\\Git_Works\\jupiter\\node_modules\\isexe\\windows.js:36:5\n' +
  gyp verb `which` failed     '    at FSReqCallback.oncomplete (fs.js:165:21)',
  gyp verb `which` failed   code: 'ENOENT'
  gyp verb `which` failed }
  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:\kishore\Git_Works\jupiter\node_modules\which\which.js:13:12)
  gyp verb `which` failed     at F (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:68:19)
  gyp verb `which` failed     at E (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:80:29)
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\which\which.js:89:16
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\isexe\index.js:42:5
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\isexe\windows.js:36:5
  gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:165:21)
  gyp verb `which` failed  python Error: not found: python
  gyp verb `which` failed     at getNotFoundError (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:13:12)
  gyp verb `which` failed     at F (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:68:19)
  gyp verb `which` failed     at E (D:\kishore\Git_Works\jupiter\node_modules\which\which.js:80:29)
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\which\which.js:89:16
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\isexe\index.js:42:5
  gyp verb `which` failed     at D:\kishore\Git_Works\jupiter\node_modules\isexe\windows.js:36:5
  gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:165:21) {
  gyp verb `which` failed   stack: 'Error: not found: python\n    at getNotFoundError ' +
  gyp verb `which` failed     '(D:\\kishore\\Git_Works\\jupiter\\node_modules\\which\\which.js:13:12)\n' +
  gyp verb `which` failed     '    at F ' +
  gyp verb `which` failed     '(D:\\kishore\\Git_Works\\jupiter\\node_modules\\which\\which.js:68:19)\n' +
  gyp verb `which` failed     '    at E ' +
  gyp verb `which` failed     '(D:\\kishore\\Git_Works\\jupiter\\node_modules\\which\\which.js:80:29)\n' +
  gyp verb `which` failed     '    at ' +
  gyp verb `which` failed     'D:\\kishore\\Git_Works\\jupiter\\node_modules\\which\\which.js:89:16\n' +
  gyp verb `which` failed     '    at ' +
  gyp verb `which` failed     'D:\\kishore\\Git_Works\\jupiter\\node_modules\\isexe\\index.js:42:5\n ' +
  gyp verb `which` failed     '   at ' +
  gyp verb `which` failed     'D:\\kishore\\Git_Works\\jupiter\\node_modules\\isexe\\windows.js:36:5\n' +
  gyp verb `which` failed     '    at FSReqCallback.oncomplete (fs.js:165:21)',
  gyp verb `which` failed   code: 'ENOENT'
  gyp verb `which` failed }
  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:\kishore\Git_Works\jupiter\node_modules\node-gyp\lib\configure.js:484:19)
  gyp ERR! stack     at PythonFinder.&lt;anonymous&gt; (D:\kishore\Git_Works\jupiter\node_modules\node-gyp\lib\configure.js:509:16)
  gyp ERR! stack     at D:\kishore\Git_Works\jupiter\node_modules\graceful-fs\polyfills.js:282:31
  gyp ERR! stack     at FSReqCallback.oncomplete (fs.js:165:21)
  gyp ERR! System Windows_NT 10.0.17134
  gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "D:\\kishore\\Git_Works\\jupiter\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
  gyp ERR! cwd D:\kishore\Git_Works\jupiter\node_modules\node-sass
  gyp ERR! node -v v12.4.0
  gyp ERR! node-gyp -v v3.8.0
  gyp ERR! not ok
  Build failed with error code: 1
  npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.9 (node_modules\fsevents):
  npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.9: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})
  
  npm ERR! code ELIFECYCLE
  npm ERR! errno 1
  npm ERR! node-sass@4.10.0 postinstall: `node scripts/build.js`
  npm ERR! Exit status 1
  npm ERR!
  npm ERR! Failed at the node-sass@4.10.0 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\IEUI18-1\AppData\Roaming\npm-cache\_logs\2019-06-21T10_25_49_347Z-debug.log
  
  D:\kishore\Git_Works\jupiter&gt;
  </code></pre>
  
  <p>Can anyone help me out to solve this problem?</p>