在这里输入代码
PS C:\Users\a\Desktop\vue-admin-template> npm rebuild node-sass

> node-sass@4.13.1 install C:\Users\a\Desktop\vue-admin-template\node_modules\node-sass
> node scripts/install.js

Downloading binary from https://github.com/sass/node-sass/releases/download/v4.13.1/win32-x64-72_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v4.13.1/win32-x64-72_binding.node":

ESOCKETTIMEDOUT

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

> node-sass@4.13.1 postinstall C:\Users\a\Desktop\vue-admin-template\node_modules\node-sass
> node scripts/build.js

Building: E:\微信小程序\云后端\node.exe C:\Users\a\Desktop\vue-admin-template\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   'E:\\微信小程序\\云后端\\node.exe',
gyp verb cli   'C:\\Users\\a\\Desktop\\vue-admin-template\\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@12.16.1 | 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 (C:\Users\a\Desktop\vue-admin-template\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (C:\Users\a\Desktop\vue-admin-template\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (C:\Users\a\Desktop\vue-admin-template\node_modules\which\which.js:80:29)
gyp verb `which` failed     at C:\Users\a\Desktop\vue-admin-template\node_modules\which\which.js:89:16
gyp verb `which` failed     at C:\Users\a\Desktop\vue-admin-template\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at C:\Users\a\Desktop\vue-admin-template\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:166:21)
gyp verb `which` failed  python2 Error: not found: python2
gyp verb `which` failed     at getNotFoundError (C:\Users\a\Desktop\vue-admin-template\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (C:\Users\a\Desktop\vue-admin-template\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (C:\Users\a\Desktop\vue-admin-template\node_modules\which\which.js:80:29)
gyp verb `which` failed     at C:\Users\a\Desktop\vue-admin-template\node_modules\which\which.js:89:16
gyp verb `which` failed     at C:\Users\a\Desktop\vue-admin-template\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at C:\Users\a\Desktop\vue-admin-template\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqCallback.oncomplete (fs.js:166:21) {
gyp verb `which` failed   stack: 'Error: not found: python2\n' +
gyp verb `which` failed     '    at getNotFoundError (C:\\Users\\a\\Desktop\\vue-admin-template\\node_modules\\which\\which.js:13:12)\n' +
gyp verb `which` failed     '    at F (C:\\Users\\a\\Desktop\\vue-admin-template\\node_modules\\which\\which.js:68:19)\n' +
gyp verb `which` failed     '    at E (C:\\Users\\a\\Desktop\\vue-admin-template\\node_modules\\which\\which.js:80:29)\n' +
gyp verb `which` failed     '    at C:\\Users\\a\\Desktop\\vue-admin-template\\node_modules\\which\\which.js:89:16\n' +
gyp verb `which` failed     '    at C:\\Users\\a\\Desktop\\vue-admin-template\\node_modules\\isexe\\index.js:42:5\n' +
gyp verb `which` failed     '    at C:\\Users\\a\\Desktop\\vue-admin-template\\node_modules\\isexe\\windows.js:36:5\n' +
gyp verb `which` failed     '    at FSReqCallback.oncomplete (fs.js:166:21)',
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` succeeded python E:\Python\python.EXE
gyp verb check python version `E:\Python\python.EXE -c "import sys; print "2.7.15
gyp verb check python version .%s.%s" % sys.version_info[:3];"` returned: %j
gyp verb get node dir no --target version specified, falling back to host node version: 12.16.1
gyp verb command install [ '12.16.1' ]
gyp verb install input version string "12.16.1"
gyp verb install installing version: 12.16.1
gyp verb install --ensure was passed, so won't reinstall if already installed
gyp verb install version is already installed, need to check "installVersion"
gyp verb got "installVersion" 0
gyp verb needs "installVersion" 9
gyp verb install version is no good; reinstalling
gyp verb ensuring nodedir is created C:\Users\a\.node-gyp\12.16.1
gyp http GET https://nodejs.org/download/release/v12.16.1/node-v12.16.1-headers.tar.gz
gyp http 200 https://nodejs.org/download/release/v12.16.1/node-v12.16.1-headers.tar.gz
gyp verb extracted file from tarball include\node\common.gypi
gyp verb extracted file from tarball include\node\config.gypi
gyp verb extracted file from tarball include\node\node.h
gyp verb extracted file from tarball include\node\node_api.h
gyp verb extracted file from tarball include\node\js_native_api.h
gyp verb extracted file from tarball include\node\js_native_api_types.h
gyp verb extracted file from tarball include\node\node_api_types.h
gyp verb extracted file from tarball include\node\node_buffer.h
gyp verb extracted file from tarball include\node\node_object_wrap.h
gyp verb extracted file from tarball include\node\node_version.h
gyp verb extracted file from tarball include\node\v8-wasm-trap-handler-win.h
gyp verb extracted file from tarball include\node\v8.h
gyp verb extracted file from tarball include\node\v8-profiler.h
gyp verb extracted file from tarball include\node\v8-util.h
gyp verb extracted file from tarball include\node\v8-platform.h
gyp verb extracted file from tarball include\node\v8-value-serializer-version.h
gyp verb extracted file from tarball include\node\v8-version-string.h
gyp verb extracted file from tarball include\node\v8-version.h
gyp verb extracted file from tarball include\node\v8config.h
gyp verb extracted file from tarball include\node\v8-internal.h
gyp verb extracted file from tarball include\node\v8-wasm-trap-handler-posix.h
gyp verb extracted file from tarball include\node\v8-testing.h
gyp verb extracted file from tarball include\node\libplatform\libplatform-export.h
gyp verb extracted file from tarball include\node\libplatform\libplatform.h
gyp verb extracted file from tarball include\node\libplatform\v8-tracing.h
gyp verb extracted file from tarball include\node\uv\aix.h
gyp verb extracted file from tarball include\node\uv\android-ifaddrs.h
gyp verb extracted file from tarball include\node\uv\bsd.h
gyp verb extracted file from tarball include\node\uv\darwin.h
gyp verb extracted file from tarball include\node\uv\linux.h
gyp verb extracted file from tarball include\node\uv\os390.h
gyp verb extracted file from tarball include\node\uv\posix.h
gyp verb extracted file from tarball include\node\uv\stdint-msvc2008.h
gyp verb extracted file from tarball include\node\uv\sunos.h
gyp verb extracted file from tarball include\node\uv\threadpool.h
gyp verb extracted file from tarball include\node\uv\tree.h