gyp ERR! stack Error: Can‘t find Python executable “python“, you can set the PYTHON env variable.

运行npm install时提示如下错误：

Building: D:\Program_Files\nodejs\node.exe D:\workspace\market\src\main\resources\admin\admin\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   'D:\\Program_Files\\nodejs\\node.exe',
gyp verb cli   'D:\\workspace\\market\\src\\main\\resources\\admin\\admin\\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@12.18.4 | 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:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:168:21)
gyp verb `which` failed  python2 Error: not found: python2
gyp verb `which` failed     at getNotFoundError (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:168:21) {
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:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:168:21)
gyp verb `which` failed  python Error: not found: python
gyp verb `which` failed     at getNotFoundError (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:80:29)
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\which\which.js:89:16
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at D:\workspace\market\src\main\resources\admin\admin\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:168:21) {
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:\workspace\market\src\main\resources\admin\admin\node_modules\node-gyp\lib\configure.js:484:19)
gyp ERR! stack     at PythonFinder.<anonymous> (D:\workspace\market\src\main\resources\admin\admin\node_modules\node-gyp\lib\configure.js:509:16)
gyp ERR! stack     at callback (D:\workspace\market\src\main\resources\admin\admin\node_modules\graceful-fs\polyfills.js:295:20)
gyp ERR! stack     at FSReqCallback.oncomplete (fs.js:168:21)
gyp ERR! System Windows_NT 10.0.19044
gyp ERR! command "D:\\Program_Files\\nodejs\\node.exe" "D:\\workspace\\market\\src\\main\\resources\\admin\\admin\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--libsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd D:\workspace\market\src\main\resources\admin\admin\node_modules\node-sass
gyp ERR! node -v v12.18.4
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
Build failed with error code: 1

解决办法：

a、安装cnpm：npm install cnpm@7.1.0 -g --registry=https://registry.npm.taobao.org
b、查cnpm版本：cnpm -v 
c、使用cnpm下载项目依赖：cnpm install
d、使用cnpm构建项目：cnpm run build
e、使用cnpm启动项目：cnpm run serve