56.ERR! configure error gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.

Node.js 在安装模块的时候报错，缺少python环境。

ERR! configure error gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.

错误信息如下：

1 2 3 4 5 6 7 8 9 10 11 12

D: ode_modulesselenium-webdriver ode_modulesws ode_modulesutf-8-validate>node "D:Program Files odejs ode_modules pmin ode-gyp-bin\.... ode_modules ode-gypin ode-gyp.js" rebuild ERR! configure error gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable. gyp ERR! stack     at failNoPython (D:Program Files odejs ode_modules pm ode_modules ode-gyplibconfigure.js:103:14) gyp ERR! stack     at D:Program Files odejs ode_modules pm ode_modules ode-gyplibconfigure.js:64:11 gyp ERR! stack     at Object.oncomplete (fs.js:107:15) gyp ERR! System Windows_NT 6.2.9200 gyp ERR! command "node" "D:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js" "rebuild" gyp ERR! cwd D: ode_modulesselenium-webdriver ode_modulesws ode_modulesutf-8-validate gyp ERR! node -v v0.10.29 gyp ERR! node-gyp -v v0.13.1 gyp ERR! not ok

原因看node-gyp的安装需求，https://github.com/nodejs/node-gyp， 部分剪切如下，可以请求的看到需要安装python2.7（其实2.6也行）python3不行

You can install with npm:

$ npm install -g node-gyp

You will also need to install:

• On Unix:

• python (v2.7 recommended, v3.x.x is not supported)

• make

• A proper C/C++ compiler toolchain, like GCC

• On Mac OS X:

• You also need to install the Command Line Tools via Xcode. You can find this under the menu Xcode -> Preferences -> Downloads

• This step will install gcc and the related toolchain containing make

• python (v2.7 recommended, v3.x.x is not supported) (already installed on Mac OS X)

• Xcode

• On Windows:

• For 64-bit builds of node and native modules you will also need the Windows 7 64-bit SDK

• You may need to run one of the following commands if your build complains about WindowsSDKDir not being set, and you are sure you have already installed the SDK:

• Microsoft Visual Studio C++ 2013 for Windows Desktop (Express version works well)

• Microsoft Visual Studio C++ 2013 (Express version works well)

• If the install fails, try uninstalling any C++ 2010 x64&x86 Redistributable that you have installed first

• If you get errors that the 64-bit compilers are not installed you may also need thecompiler update for the Windows SDK 7.1

• Make sure that you have a PYTHON environment variable, and it is set to drive:path opython.exe not to a folder

• Python (v2.7.3 recommended, v3.x.x is not supported)

• Windows XP/Vista/7:

• Windows 7/8:

• All Windows Versions

call "C:Program FilesMicrosoft SDKsWindowsv7.1inSetenv.cmd" /Release /x86
call "C:Program FilesMicrosoft SDKsWindowsv7.1inSetenv.cmd" /Release /x64

If you have multiple Python versions installed, you can identify which Python version node-gyp uses by setting the '--python' variable:

$ node-gyp --python /path/to/python2.7

If node-gyp is called by way of npm and you have multiple versions of Python installed, then you can set npm's 'python' config key to the appropriate value:

$ npm config set python /path/to/executable/python2.7

Note that OS X is just a flavour of Unix and so needs python, make, and C/C++. An easy way to obtain these is to install XCode from Apple, and then use it to install the command line tools (under Preferences -> Downloads).

所以下载安装Python2.7就行了，记得配环境变量。