npm install 报错：gyp verb `which` failed Error: not found: python

今天新启动一个项目，在 npm install 安装依赖项时出现报错。

$ npm install

> husky@0.14.3 install D:\programs\rubik-web\node_modules\husky
> node ./bin/install.js

husky
setting up Git hooks
done


> node-sass@4.14.1 install D:\programs\rubik-web\node_modules\node-sass
> node scripts/install.js

Downloading binary from https://github.com/sass/node-sass/releases/download/v4.14.1/win32-x64-83_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v4.14.1/win32-x64-83_binding.node":

read ECONNRESET

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

> core-js@2.6.11 postinstall D:\programs\rubik-web\node_modules\core-js
> node -e "try{require('./postinstall')}catch(e){}"

Thank you for using core-js ( https://github.com/zloirock/core-js ) for polyfilling JavaScript standard library!

The project needs your help! Please consider supporting of core-js on Open Collective or Patreon:
> https://opencollective.com/core-js
> https://www.patreon.com/zloirock

Also, the author of core-js ( https://github.com/zloirock ) is looking for a good job -)


> ejs@2.7.4 postinstall D:\programs\rubik-web\node_modules\ejs
> node ./postinstall.js

Thank you for installing EJS: built with the Jake JavaScript build tool (https://jakejs.com/)


> node-sass@4.14.1 postinstall D:\programs\rubik-web\node_modules\node-sass
> node scripts/build.js

Building: C:\Program Files\nodejs\node.exe D:\programs\rubik-web\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:\\programs\\rubik-web\\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@14.5.0 | 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:\programs\rubik-web\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\programs\rubik-web\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\programs\rubik-web\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:176:21)
gyp verb `which` failed  python2 Error: not found: python2
gyp verb `which` failed     at getNotFoundError (D:\programs\rubik-web\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\programs\rubik-web\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\programs\rubik-web\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:176:21) {
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:\programs\rubik-web\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\programs\rubik-web\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\programs\rubik-web\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:176:21)
gyp verb `which` failed  python Error: not found: python
gyp verb `which` failed     at getNotFoundError (D:\programs\rubik-web\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\programs\rubik-web\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\programs\rubik-web\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\programs\rubik-web\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:176:21) {
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:\programs\rubik-web\node_modules\node-gyp\lib\configure.js:484:19)
gyp ERR! stack     at PythonFinder.<anonymous> (D:\programs\rubik-web\node_modules\node-gyp\lib\configure.js:509:16)
gyp ERR! stack     at callback (D:\programs\rubik-web\node_modules\graceful-fs\polyfills.js:295:20)
gyp ERR! stack     at FSReqCallback.oncomplete (fs.js:176:21)
gyp ERR! System Windows_NT 10.0.18363
gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "D:\\programs\\rubik-web\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd D:\programs\rubik-web\node_modules\node-sass
gyp ERR! node -v v14.5.0
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@1.2.13 (node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.13: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! node-sass@4.14.1 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.14.1 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\wangdan11\AppData\Roaming\npm-cache\_logs\2020-07-21T06_55_31_581Z-debug.log

有问题，网上找，你踩的坑，前辈们应该早就踩过。

最终解决方案为：

npm install -g mirror-config-china --registry=http://registry.npm.taobao.org
npm install node-sass
npm install

OK，搞定了。