win7 install node-sass出错，提示not found: python2

Question

• 构建vue.js项目，下载依赖的node-sass模块。但不管npm install还是单独npm install node-sass都报找不到python的错误。

$ npm install
npm WARN prefer global node-gyp@3.6.0 should be installed with -g

> node-sass@4.5.2 install E:\workspace_vscode\yijianyiv1\node_modules\node-sass
> node scripts/install.js

Downloading binary from https://github.com/sass/node-sass/releases/download/v4.5                                                 .2/win32-x64-48_binding.node
Cannot download "https://github.com/sass/node-sass/releases/download/v4.5.2/win3                                                 2-x64-48_binding.node":

connect ETIMEDOUT 54.231.72.83:443

Timed out whilst downloading the prebuilt binary

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@4.5.2 postinstall E:\workspace_vscode\yijianyiv1\node_modules\node-sass
> node scripts/build.js

Building: D:\nodejs\node.exe E:\workspace_vscode\yijianyiv1\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_l                                                 dflags= --libsass_library=
gyp info it worked if it ends with ok
gyp verb cli [ 'D:\\nodejs\\node.exe',
gyp verb cli   'E:\\workspace_vscode\\yijianyiv1\\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 info using node-gyp@3.6.0
gyp info using node@6.9.5 | 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 (E:\workspace_vscode\yijianyiv1\ node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (E:\workspace_vscode\yijianyiv1\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (E:\workspace_vscode\yijianyiv1\node_modules\which\which.js:80:29)
gyp verb `which` failed     at E:\workspace_vscode\yijianyiv1\node_modules\which\which.js:89:16
gyp verb `which` failed     at E:\workspace_vscode\yijianyiv1\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at E:\workspace_vscode\yijianyiv1\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:123:15)
gyp verb `which` failed  python2 { Error: not found: python2
gyp verb `which` failed     at getNotFoundError (E:\workspace_vscode\yijianyiv1\node_modules\which\which.js:13:12)
gyp verb `which` failed     at F (E:\workspace_vscode\yijianyiv1\node_modules\which\which.js:68:19)
gyp verb `which` failed     at E (E:\workspace_vscode\yijianyiv1\node_modules\which\which.js:80:29)
gyp verb `which` failed     at E:\workspace_vscode\yijianyiv1\node_modules\which\which.js:89:16
gyp verb `which` failed     at E:\workspace_vscode\yijianyiv1\node_modules\isexe\index.js:42:5
gyp verb `which` failed     at E:\workspace_vscode\yijianyiv1\node_modules\isexe\windows.js:36:5
gyp verb `which` failed     at FSReqWrap.oncomplete (fs.js:123:15) code: 'ENOENT' }
gyp verb check python checking for Python executable "python" in the PATH
gyp verb `which` succeeded python D:\Python\python.EXE
gyp verb check python version `D:\Python\python.EXE -c "import platform; print(platform.python_version());"` returned: "3.6.1\r\n"
gyp verb could not find "D:\Python\python.EXE". checking python launcher
gyp verb could not find "D:\Python\python.EXE". 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 "D:\Python\python.EXE", you can set the PYTHON env variable.
gyp ERR! stack     at Object.failNoPython (E:\workspace_vscode\yijianyiv1\node_modules\node-gyp\lib\configure.js:482:19)
gyp ERR! stack     at Object.<anonymous> (E:\workspace_vscode\yijianyiv1\node_modules\node-gyp\lib\configure.js:508:16)
gyp ERR! stack     at E:\workspace_vscode\yijianyiv1\node_modules\graceful-fs\polyfills.js:284:29
gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:123:15)
gyp ERR! System Windows_NT 6.1.7601
gyp ERR! command "D:\\nodejs\\node.exe" "E:\\workspace_vscode\\yijianyiv1\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild" "--verbose" "--libsass_ext=" "--l                                                 ibsass_cflags=" "--libsass_ldflags=" "--libsass_library="
gyp ERR! cwd E:\workspace_vscode\yijianyiv1\node_modules\node-sass
gyp ERR! node -v v6.9.5
gyp ERR! node-gyp -v v3.6.0
gyp ERR! not ok
Build failed with error code: 1
yijianyiv1@1.0.0 E:\workspace_vscode\yijianyiv1
+-- autoprefixer@6.7.7
| +-- browserslist@1.7.7
| | `-- electron-to-chromium@1.3.3
| +-- caniuse-db@1.0.30000653
| +-- normalize-range@0.1.2
| +-- num2fraction@1.2.2
| +-- postcss@5.2.17
| | `-- js-base64@2.1.9
| `-- postcss-value-parser@3.3.0
+-- babel-core@6.24.1
| +-- babel-code-frame@6.22.0
| | +-- esutils@2.0.2
| | `-- js-tokens@3.0.1
| +-- babel-generator@6.24.1
| | +-- detect-indent@4.0.0
| | | `-- repeating@2.0.1
| | |   `-- is-finite@1.0.2
| | +-- jsesc@1.3.0
| | `-- trim-right@1.0.1
| +-- babel-helpers@6.24.1
| +-- babel-messages@6.23.0
| +-- babel-runtime@6.23.0
| | `-- regenerator-runtime@0.10.3
| +-- babel-template@6.24.1
| +-- babel-traverse@6.24.1
| | `-- globals@9.17.0
| +-- babel-types@6.24.1
| | `-- to-fast-properties@1.0.2
| +-- babylon@6.16.1
| +-- convert-source-map@1.5.0
| +-- debug@2.6.3
| | `-- ms@0.7.2
| +-- json5@0.5.1
| +-- lodash@4.17.4
| +-- minimatch@3.0.3
| | `-- brace-expansion@1.1.7
| |   +-- balanced-match@0.4.2
| |   `-- concat-map@0.0.1
| +-- path-is-absolute@1.0.1
| +-- private@0.1.7
| +-- slash@1.0.0
| `-- source-map@0.5.6
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| +-- find-cache-dir@0.1.1
| | +-- commondir@1.0.1
| | `-- pkg-dir@1.0.0
| |   `-- find-up@1.1.2
| |     `-- path-exists@2.1.0
| +-- loader-utils@0.2.17
| | +-- big.js@3.1.3
| | `-- emojis-list@2.1.0
| +-- mkdirp@0.5.1
| | `-- minimist@0.0.8
| `-- object-assign@4.1.1
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| +-- babel-plugin-transform-async-to-generator@6.24.1
| | +-- babel-helper-remap-async-to-generator@6.24.1
| | `-- babel-plugin-syntax-async-functions@6.13.0
| +-- babel-plugin-transform-es2015-arrow-functions@6.22.0
| +-- babel-plugin-transform-es2015-block-scoped-functions@6.22.0
| +-- babel-plugin-transform-es2015-block-scoping@6.24.1
| +-- babel-plugin-transform-es2015-classes@6.24.1
| | +-- babel-helper-define-map@6.24.1
| | +-- babel-helper-function-name@6.24.1
| | +-- babel-helper-optimise-call-expression@6.24.1
| | `-- babel-helper-replace-supers@6.24.1
| +-- babel-plugin-transform-es2015-computed-properties@6.24.1
| +-- babel-plugin-transform-es2015-destructuring@6.23.0
| +-- babel-plugin-transform-es2015-duplicate-keys@6.24.1
| +-- babel-plugin-transform-es2015-for-of@6.23.0
| +-- babel-plugin-transform-es2015-function-name@6.24.1
| +-- babel-plugin-transform-es2015-literals@6.22.0
| +-- babel-plugin-transform-es2015-modules-amd@6.24.1
| +-- babel-plugin-transform-es2015-modules-commonjs@6.24.1
| | `-- babel-plugin-transform-strict-mode@6.24.1
| +-- babel-plugin-transform-es2015-modules-systemjs@6.24.1
| | `-- babel-helper-hoist-variables@6.24.1
| +-- babel-plugin-transform-es2015-modules-umd@6.24.1
| +-- babel-plugin-transform-es2015-object-super@6.24.1
| +-- babel-plugin-transform-es2015-parameters@6.24.1
| | +-- babel-helper-call-delegate@6.24.1
| | `-- babel-helper-get-function-arity@6.24.1
| +-- babel-plugin-transform-es2015-shorthand-properties@6.24.1
| +-- babel-plugin-transform-es2015-spread@6.22.0
| +-- babel-plugin-transform-es2015-sticky-regex@6.24.1
| | `-- babel-helper-regex@6.24.1
| +-- babel-plugin-transform-es2015-template-literals@6.22.0
| +-- babel-plugin-transform-es2015-typeof-symbol@6.23.0
| +-- babel-plugin-transform-es2015-unicode-regex@6.24.1
| | `-- regexpu-core@2.0.0
| |   +-- regenerate@1.3.2
| |   +-- regjsgen@0.2.0
| |   `-- regjsparser@0.1.5
| |     `-- jsesc@0.5.0
| +-- babel-plugin-transform-exponentiation-operator@6.24.1
| | +-- babel-helper-builder-binary-assignment-operator-visitor@6.24.1
| | | `-- babel-helper-explode-assignable-expression@6.24.1
| | `-- babel-plugin-syntax-exponentiation-operator@6.13.0
| +-- babel-plugin-transform-regenerator@6.24.1
| | `-- regenerator-transform@0.9.11
| `-- invariant@2.2.2
|   `-- loose-envify@1.3.1
+-- babel-preset-stage-2@6.24.1
| +-- babel-plugin-syntax-dynamic-import@6.18.0
| +-- babel-plugin-transform-class-properties@6.24.1
| | `-- babel-plugin-syntax-class-properties@6.13.0
| +-- babel-plugin-transform-decorators@6.24.1
| | +-- babel-helper-explode-class@6.24.1
| | | `-- babel-helper-bindify-decorators@6.24.1
| | `-- babel-plugin-syntax-decorators@6.13.0
| `-- babel-preset-stage-3@6.24.1
|   +-- babel-plugin-transform-async-generator-functions@6.24.1
|   | `-- babel-plugin-syntax-async-generators@6.13.0
|   `-- babel-plugin-transform-object-rest-spread@6.23.0
|     `-- babel-plugin-syntax-object-rest-spread@6.13.0
+-- babel-register@6.24.1
| +-- core-js@2.4.1
| +-- home-or-tmp@2.0.0
| | +-- os-homedir@1.0.2
| | `-- os-tmpdir@1.0.2
| `-- source-map-support@0.4.14
+-- chalk@1.1.3
| +-- ansi-styles@2.2.1
| +-- escape-string-regexp@1.0.5
| +-- has-ansi@2.0.0
| | `-- ansi-regex@2.1.1
| +-- strip-ansi@3.0.1
| `-- supports-color@2.0.0
+-- connect-history-api-fallback@1.3.0
+-- copy-webpack-plugin@4.0.1
| +-- bluebird@2.11.0
| +-- fs-extra@0.26.7
| | +-- graceful-fs@4.1.11
| | +-- jsonfile@2.4.0
| | `-- klaw@1.3.1
| +-- glob@6.0.4
| | +-- inflight@1.0.6
| | | `-- wrappy@1.0.2
| | +-- inherits@2.0.3
| | `-- once@1.4.0
| +-- is-glob@3.1.0
| | `-- is-extglob@2.1.1
| `-- node-dir@0.1.16
+-- css-loader@0.26.4
| +-- css-selector-tokenizer@0.7.0
| | +-- cssesc@0.1.0
| | +-- fastparse@1.1.1
| | `-- regexpu-core@1.0.0
| +-- cssnano@3.10.0
| | +-- decamelize@1.2.0
| | +-- defined@1.0.0
| | +-- has@1.0.1
| | | `-- function-bind@1.1.0
| | +-- postcss-calc@5.3.1
| | | +-- postcss-message-helpers@2.0.0
| | | `-- reduce-css-calc@1.3.0
| | |   +-- math-expression-evaluator@1.2.16
| | |   `-- reduce-function-call@1.0.2
| | +-- postcss-colormin@2.2.2
| | | `-- colormin@1.1.2
| | |   +-- color@0.11.4
| | |   | +-- clone@1.0.2
| | |   | +-- color-convert@1.9.0
| | |   | | `-- color-name@1.1.2
| | |   | `-- color-string@0.3.0
| | |   `-- css-color-names@0.0.4
| | +-- postcss-convert-values@2.6.1
| | +-- postcss-discard-comments@2.0.4
| | +-- postcss-discard-duplicates@2.1.0
| | +-- postcss-discard-empty@2.1.0
| | +-- postcss-discard-overridden@0.1.1
| | +-- postcss-discard-unused@2.2.3
| | | `-- uniqs@2.0.0
| | +-- postcss-filter-plugins@2.0.2
| | | `-- uniqid@4.1.1
| | |   `-- macaddress@0.2.8
| | +-- postcss-merge-idents@2.1.7
| | +-- postcss-merge-longhand@2.0.2
| | +-- postcss-merge-rules@2.1.2
| | | +-- caniuse-api@1.6.1
| | | | +-- lodash.memoize@4.1.2
| | | | `-- lodash.uniq@4.5.0
| | | `-- vendors@1.0.1
| | +-- postcss-minify-font-values@1.0.5
| | +-- postcss-minify-gradients@1.0.5
| | +-- postcss-minify-params@1.2.2
| | | `-- alphanum-sort@1.0.2
| | +-- postcss-minify-selectors@2.1.1
| | +-- postcss-normalize-charset@1.1.1
| | +-- postcss-normalize-url@3.0.8
| | | +-- is-absolute-url@2.1.0
| | | `-- normalize-url@1.9.1
| | |   +-- prepend-http@1.0.4
| | |   +-- query-string@4.3.2
| | |   | `-- strict-uri-encode@1.1.0
| | |   `-- sort-keys@1.1.2
| | |     `-- is-plain-obj@1.1.0
| | +-- postcss-ordered-values@2.2.3
| | +-- postcss-reduce-idents@2.4.0
| | +-- postcss-reduce-initial@1.0.1
| | +-- postcss-reduce-transforms@1.0.4
| | +-- postcss-svgo@2.1.6
| | | +-- is-svg@2.1.0
| | | | `-- html-comment-regex@1.1.1
| | | `-- svgo@0.7.2
| | |   +-- coa@1.0.1
| | |   | `-- q@1.5.0
| | |   +-- colors@1.1.2
| | |   +-- csso@2.3.2
| | |   | `-- clap@1.1.3
| | |   +-- sax@1.2.2
| | |   `-- whet.extend@0.9.9
| | +-- postcss-unique-selectors@2.0.2
| | `-- postcss-zindex@2.2.0
| +-- loader-utils@1.1.0
| +-- lodash.camelcase@4.3.0
| +-- postcss-modules-extract-imports@1.0.1
| +-- postcss-modules-local-by-default@1.1.1
| | `-- css-selector-tokenizer@0.6.0
| |   `-- regexpu-core@1.0.0
| +-- postcss-modules-scope@1.0.2
| | `-- css-selector-tokenizer@0.6.0
| |   `-- regexpu-core@1.0.0
| +-- postcss-modules-values@1.2.2
| | `-- icss-replace-symbols@1.0.2
| `-- source-list-map@0.1.8
+-- eventsource-polyfill@0.9.6
+-- express@4.15.2
| +-- accepts@1.3.3
| | +-- mime-types@2.1.15
| | | `-- mime-db@1.27.0
| | `-- negotiator@0.6.1
| +-- array-flatten@1.1.1
| +-- content-disposition@0.5.2
| +-- content-type@1.0.2
| +-- cookie@0.3.1
| +-- cookie-signature@1.0.6
| +-- debug@2.6.1
| +-- depd@1.1.0
| +-- encodeurl@1.0.1
| +-- escape-html@1.0.3
| +-- etag@1.8.0
| +-- finalhandler@1.0.1
| | `-- unpipe@1.0.0
| +-- fresh@0.5.0
| +-- merge-descriptors@1.0.1
| +-- methods@1.1.2
| +-- on-finished@2.3.0
| | `-- ee-first@1.1.1
| +-- parseurl@1.3.1
| +-- path-to-regexp@0.1.7
| +-- proxy-addr@1.1.4
| | +-- forwarded@0.1.0
| | `-- ipaddr.js@1.3.0
| +-- qs@6.4.0
| +-- range-parser@1.2.0
| +-- send@0.15.1
| | +-- debug@2.6.1
| | +-- destroy@1.0.4
| | `-- http-errors@1.6.1
| +-- serve-static@1.12.1
| +-- setprototypeof@1.0.3
| +-- statuses@1.3.1
| +-- type-is@1.6.15
| | `-- media-typer@0.3.0
| +-- utils-merge@1.0.0
| `-- vary@1.1.1
+-- extract-text-webpack-plugin@2.1.0
| +-- ajv@4.11.6
| | +-- co@4.6.0
| | `-- json-stable-stringify@1.0.1
| |   `-- jsonify@0.0.0
| +-- async@2.3.0
| +-- loader-utils@1.1.0
| `-- webpack-sources@0.1.5
+-- file-loader@0.10.1
| `-- loader-utils@1.1.0
+-- friendly-errors-webpack-plugin@1.6.1
| +-- error-stack-parser@2.0.0
| | `-- stackframe@1.0.2
| `-- string-length@1.0.1
+-- html-webpack-plugin@2.28.0
| +-- bluebird@3.5.0
| +-- html-minifier@3.4.3
| | +-- camel-case@3.0.0
| | | +-- no-case@2.3.1
| | | | `-- lower-case@1.1.4
| | | `-- upper-case@1.1.3
| | +-- clean-css@4.0.12
| | +-- ncname@1.0.0
| | | `-- xml-char-classes@1.0.0
| | +-- param-case@2.1.1
| | `-- relateurl@0.2.7
| +-- pretty-error@2.1.0
| | +-- renderkid@2.0.1
| | | +-- css-select@1.2.0
| | | | +-- boolbase@1.0.0
| | | | +-- css-what@2.1.0
| | | | +-- domutils@1.5.1
| | | | | `-- dom-serializer@0.1.0
| | | | |   +-- domelementtype@1.1.3
| | | | |   `-- entities@1.1.1
| | | | `-- nth-check@1.0.1
| | | +-- dom-converter@0.1.4
| | | | `-- utila@0.3.3
| | | +-- htmlparser2@3.3.0
| | | | +-- domelementtype@1.3.0
| | | | +-- domhandler@2.1.0
| | | | +-- domutils@1.1.6
| | | | `-- readable-stream@1.0.34
| | | |   `-- isarray@0.0.1
| | | `-- utila@0.3.3
| | `-- utila@0.4.0
| `-- toposort@1.0.3
+-- http-proxy-middleware@0.17.4
| +-- http-proxy@1.16.2
| | +-- eventemitter3@1.2.0
| | `-- requires-port@1.0.0
| `-- micromatch@2.3.11
|   +-- arr-diff@2.0.0
|   | `-- arr-flatten@1.0.1
|   +-- array-unique@0.2.1
|   +-- braces@1.8.5
|   | +-- expand-range@1.8.2
|   | | `-- fill-range@2.2.3
|   | |   +-- is-number@2.1.0
|   | |   +-- isobject@2.1.0
|   | |   | `-- isarray@1.0.0
|   | |   +-- randomatic@1.1.6
|   | |   `-- repeat-string@1.6.1
|   | +-- preserve@0.2.0
|   | `-- repeat-element@1.1.2
|   +-- expand-brackets@0.1.5
|   | `-- is-posix-bracket@0.1.1
|   +-- extglob@0.3.2
|   | `-- is-extglob@1.0.0
|   +-- filename-regex@2.0.0
|   +-- is-extglob@1.0.0
|   +-- is-glob@2.0.1
|   +-- kind-of@3.1.0
|   | `-- is-buffer@1.1.5
|   +-- normalize-path@2.1.1
|   | `-- remove-trailing-separator@1.0.1
|   +-- object.omit@2.0.1
|   | `-- is-extendable@0.1.1
|   +-- parse-glob@3.0.4
|   | +-- glob-base@0.3.0
|   | | `-- is-glob@2.0.1
|   | |   `-- is-extglob@1.0.0
|   | +-- is-dotfile@1.0.2
|   | +-- is-extglob@1.0.0
|   | `-- is-glob@2.0.1
|   `-- regex-cache@0.4.3
|     +-- is-equal-shallow@0.1.3
|     `-- is-primitive@2.0.0
+-- opn@4.0.2
| `-- pinkie-promise@2.0.1
|   `-- pinkie@2.0.4
+-- optimize-css-assets-webpack-plugin@1.3.0
| `-- underscore@1.8.3
+-- ora@1.2.0
| +-- cli-cursor@2.1.0
| | `-- restore-cursor@2.0.0
| |   +-- onetime@2.0.1
| |   | `-- mimic-fn@1.1.0
| |   `-- signal-exit@3.0.2
| +-- cli-spinners@1.0.0
| `-- log-symbols@1.0.2
+-- rimraf@2.6.1
| `-- glob@7.1.1
|   `-- fs.realpath@1.0.0
+-- sass-loader@6.0.3
| +-- clone-deep@0.2.4
| | +-- for-own@0.1.5
| | | `-- for-in@1.0.2
| | +-- is-plain-object@2.0.1
| | | `-- isobject@1.0.2
| | +-- lazy-cache@1.0.4
| | `-- shallow-clone@0.1.2
| |   +-- kind-of@2.0.1
| |   +-- lazy-cache@0.2.7
| |   `-- mixin-object@2.0.1
| |     `-- for-in@0.1.8
| +-- loader-utils@1.1.0
| +-- lodash.tail@4.1.1
| `-- pify@2.3.0
+-- semver@5.3.0
+-- shelljs@0.7.7
| +-- glob@7.1.1
| +-- interpret@1.0.2
| `-- rechoir@0.6.2
|   `-- resolve@1.3.2
|     `-- path-parse@1.0.5
+-- url-loader@0.5.8
| +-- loader-utils@1.1.0
| `-- mime@1.3.4
+-- vue@2.2.6
+-- vue-loader@11.3.4
| +-- consolidate@0.14.5
| | `-- bluebird@3.5.0
| +-- hash-sum@1.0.2
| +-- js-beautify@1.6.12
| | +-- config-chain@1.1.11
| | | +-- ini@1.3.4
| | | `-- proto-list@1.2.4
| | +-- editorconfig@0.13.2
| | | +-- bluebird@3.5.0
| | | +-- lru-cache@3.2.0
| | | `-- sigmund@1.0.1
| | `-- nopt@3.0.6
| |   `-- abbrev@1.1.0
| +-- loader-utils@1.1.0
| +-- lru-cache@4.0.2
| | +-- pseudomap@1.0.2
| | `-- yallist@2.1.2
| +-- postcss-load-config@1.2.0
| | +-- cosmiconfig@2.1.1
| | | +-- js-yaml@3.7.0
| | | | +-- argparse@1.0.9
| | | | | `-- sprintf-js@1.0.3
| | | | `-- esprima@2.7.3
| | | +-- minimist@1.2.0
| | | +-- parse-json@2.2.0
| | | | `-- error-ex@1.3.1
| | | |   `-- is-arrayish@0.2.1
| | | `-- require-from-string@1.2.1
| | +-- postcss-load-options@1.2.0
| | `-- postcss-load-plugins@2.3.0
| +-- postcss-selector-parser@2.2.3
| | +-- flatten@1.0.2
| | +-- indexes-of@1.0.1
| | `-- uniq@1.0.1
| +-- vue-hot-reload-api@2.0.11
| `-- vue-template-es2015-compiler@1.5.2
+-- vue-router@2.4.0
+-- vue-style-loader@2.0.5
| `-- loader-utils@1.1.0
+-- vue-template-compiler@2.2.6
| +-- de-indent@1.0.2
| `-- he@1.1.1
+-- webpack@2.3.3
| +-- acorn@4.0.11
| +-- acorn-dynamic-import@2.0.2
| +-- ajv-keywords@1.5.1
| +-- enhanced-resolve@3.1.0
| +-- json-loader@0.5.4
| +-- loader-runner@2.3.0
| +-- memory-fs@0.4.1
| | +-- errno@0.1.4
| | | `-- prr@0.0.0
| | `-- readable-stream@2.2.9
| |   +-- buffer-shims@1.0.0
| |   +-- core-util-is@1.0.2
| |   +-- isarray@1.0.0
| |   +-- process-nextick-args@1.0.7
| |   +-- string_decoder@1.0.0
| |   `-- util-deprecate@1.0.2
| +-- node-libs-browser@2.0.0
| | +-- assert@1.4.1
| | +-- browserify-zlib@0.1.4
| | | `-- pako@0.2.9
| | +-- buffer@4.9.1
| | | +-- base64-js@1.2.0
| | | +-- ieee754@1.1.8
| | | `-- isarray@1.0.0
| | +-- console-browserify@1.1.0
| | | `-- date-now@0.1.4
| | +-- constants-browserify@1.0.0
| | +-- crypto-browserify@3.11.0
| | | +-- browserify-cipher@1.0.0
| | | | +-- browserify-aes@1.0.6
| | | | | `-- buffer-xor@1.0.3
| | | | +-- browserify-des@1.0.0
| | | | | `-- des.js@1.0.0
| | | | `-- evp_bytestokey@1.0.0
| | | +-- browserify-sign@4.0.4
| | | | +-- bn.js@4.11.6
| | | | +-- browserify-rsa@4.0.1
| | | | +-- elliptic@6.4.0
| | | | | +-- brorand@1.1.0
| | | | | +-- hash.js@1.0.3
| | | | | +-- hmac-drbg@1.0.1
| | | | | +-- minimalistic-assert@1.0.0
| | | | | `-- minimalistic-crypto-utils@1.0.1
| | | | `-- parse-asn1@5.1.0
| | | |   `-- asn1.js@4.9.1
| | | +-- create-ecdh@4.0.0
| | | +-- create-hash@1.1.2
| | | | +-- cipher-base@1.0.3
| | | | +-- ripemd160@1.0.1
| | | | `-- sha.js@2.4.8
| | | +-- create-hmac@1.1.4
| | | +-- diffie-hellman@5.0.2
| | | | `-- miller-rabin@4.0.0
| | | +-- pbkdf2@3.0.9
| | | +-- public-encrypt@4.0.0
| | | `-- randombytes@2.0.3
| | +-- domain-browser@1.1.7
| | +-- events@1.1.1
| | +-- https-browserify@0.0.1
| | +-- os-browserify@0.2.1
| | +-- path-browserify@0.0.0
| | +-- process@0.11.9
| | +-- punycode@1.4.1
| | +-- querystring-es3@0.2.1
| | +-- readable-stream@2.2.9
| | | +-- isarray@1.0.0
| | | `-- string_decoder@1.0.0
| | +-- stream-browserify@2.0.1
| | | `-- readable-stream@2.2.9
| | |   +-- isarray@1.0.0
| | |   `-- string_decoder@1.0.0
| | +-- stream-http@2.7.0
| | | +-- builtin-status-codes@3.0.0
| | | +-- readable-stream@2.2.9
| | | | +-- isarray@1.0.0
| | | | `-- string_decoder@1.0.0
| | | +-- to-arraybuffer@1.0.1
| | | `-- xtend@4.0.1
| | +-- string_decoder@0.10.31
| | +-- timers-browserify@2.0.2
| | | `-- setimmediate@1.0.5
| | +-- tty-browserify@0.0.0
| | +-- url@0.11.0
| | | `-- punycode@1.3.2
| | +-- util@0.10.3
| | | `-- inherits@2.0.1
| | `-- vm-browserify@0.0.4
| |   `-- indexof@0.0.1
| +-- supports-color@3.2.3
| | `-- has-flag@1.0.0
| +-- tapable@0.2.6
| +-- uglify-js@2.8.22
| | +-- uglify-to-browserify@1.0.2
| | `-- yargs@3.10.0
| |   +-- camelcase@1.2.1
| |   +-- cliui@2.1.0
| |   | +-- center-align@0.1.3
| |   | | `-- align-text@0.1.4
| |   | |   `-- longest@1.0.1
| |   | +-- right-align@0.1.3
| |   | `-- wordwrap@0.0.2
| |   `-- window-size@0.1.0
| +-- watchpack@1.3.1
| | `-- chokidar@1.6.1
| |   +-- anymatch@1.3.0
| |   | `-- arrify@1.0.1
| |   +-- async-each@1.0.1
| |   +-- glob-parent@2.0.0
| |   | `-- is-glob@2.0.1
| |   |   `-- is-extglob@1.0.0
| |   +-- is-binary-path@1.0.1
| |   | `-- binary-extensions@1.8.0
| |   +-- is-glob@2.0.1
| |   | `-- is-extglob@1.0.0
| |   `-- readdirp@2.1.0
| |     +-- readable-stream@2.2.9
| |     | +-- isarray@1.0.0
| |     | `-- string_decoder@1.0.0
| |     `-- set-immediate-shim@1.0.1
| +-- webpack-sources@0.2.3
| | `-- source-list-map@1.1.1
| `-- yargs@6.6.0
|   +-- camelcase@3.0.0
|   +-- cliui@3.2.0
|   | `-- wrap-ansi@2.1.0
|   +-- get-caller-file@1.0.2
|   +-- os-locale@1.4.0
|   | `-- lcid@1.0.0
|   |   `-- invert-kv@1.0.0
|   +-- read-pkg-up@1.0.1
|   | `-- read-pkg@1.1.0
|   |   +-- load-json-file@1.1.0
|   |   | `-- strip-bom@2.0.0
|   |   |   `-- is-utf8@0.2.1
|   |   +-- normalize-package-data@2.3.6
|   |   | +-- hosted-git-info@2.4.2
|   |   | +-- is-builtin-module@1.0.0
|   |   | | `-- builtin-modules@1.1.1
|   |   | `-- validate-npm-package-license@3.0.1
|   |   |   +-- spdx-correct@1.0.2
|   |   |   | `-- spdx-license-ids@1.2.2
|   |   |   `-- spdx-expression-parse@1.0.4
|   |   `-- path-type@1.1.0
|   +-- require-directory@2.1.1
|   +-- require-main-filename@1.0.1
|   +-- set-blocking@2.0.0
|   +-- string-width@1.0.2
|   | +-- code-point-at@1.1.0
|   | `-- is-fullwidth-code-point@1.0.0
|   |   `-- number-is-nan@1.0.1
|   +-- which-module@1.0.0
|   +-- y18n@3.2.1
|   `-- yargs-parser@4.2.1
+-- webpack-bundle-analyzer@2.4.0
| +-- acorn@5.0.3
| +-- commander@2.9.0
| | `-- graceful-readlink@1.0.1
| +-- ejs@2.5.6
| +-- filesize@3.5.6
| +-- gzip-size@3.0.0
| | `-- duplexer@0.1.1
| `-- opener@1.4.3
+-- webpack-dev-middleware@1.10.1
+-- webpack-hot-middleware@2.18.0
| +-- ansi-html@0.0.7
| +-- html-entities@1.2.0
| `-- querystring@0.2.0
`-- webpack-merge@2.6.1

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules\ch                                                 okidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@                                                 1.1.1: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"}                                                 )
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "D:\\nodejs\\node.exe" "D:\\nodejs\\node_modules\\npm\\bin\\npm-cl                                                 i.js" "install"
npm ERR! node v6.9.5
npm ERR! npm  v3.10.10
npm ERR! code ELIFECYCLE

npm ERR! node-sass@4.5.2 postinstall: `node scripts/build.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@4.5.2 postinstall script 'node scripts/build.js                                                 '.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the node-sass package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     node scripts/build.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs node-sass
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls node-sass
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     E:\workspace_vscode\yijianyiv1\npm-debug.log

• 重点是我本地已经安装了Python了 ，DOS命令下是执行python，输出如下：

C:\Users\Administrator>python
Python 3.6.1 (v3.6.1:69c0db5, Mar 21 2017, 18:41:36) [MSC v.1900 64 bit (AMD64)]
 on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>

Answer 1

表示node-sass并不需要python2...
我特意把环境变量清空，把python和node都删除，重新安装了python3.6.1(64x)和nodejsv6.10.2然后用cnpm install node-sass --save-dev就直接装上并且可以正常编译sassscss了。。

node-sass是4.5.2，直接cnpm就安装成功了

Answer 2

node-sass编译需要python2

你装的是python3

Answer 3

这个考虑两方面：
1、py及其版本
2、墙

Answer 4

1.安装python2.7

2.npm rebuild node-sass

Answer 5

问题已解决

1. Python3和Python2确实有版本差异，删除3后安装2（python-2.7.6.msi）

2. cnpm install node-sass --save-dev

Answer 6

我把python卸载了重新 npm i 就行,
好像有python的情况下会用python编译一些东西,没有的话就直接下载dist的,不会编译.然后就好了