Windows环境下npm install安装包依赖时，常出现一些错误，下面为个人解决办法：

缺少python环境：

G:\nodejs\moviesite\node_modules\bcrypt>if not defined npm_config_node_gyp (node "D:\Program Files\nodejs\node_modules\npm\bin\node-gyp-bin\\..\..\node_modulesnode-gyp\bin\node-gyp.js" rebuild ) else (rebuild) gyp ERR! configure error gyp ERR! stack Error: Can‘t find Python executable "python", you can set the PYT HON env variable. gyp ERR! stack at failNoPython (D:\Program Files\nodejs\node_modules\npm\nod e_modules\node-gyp\lib\configure.js:103:14) gyp ERR! stack at D:\Program Files\nodejs\node_modules\npm\node_modules\node -gyp\lib\configure.js:64:11 gyp ERR! stack at FSReqWrap.oncomplete (evalmachine.<anonymous>:95:15) gyp ERR! System Windows_NT 6.3.9600 gyp ERR! command "node" "D:\\Program Files\\nodejs\\node_modules\\npm\\node_modu les\\node-gyp\\bin\\node-gyp.js" "rebuild" gyp ERR! cwd G:\nodejs\moviesite\node_modules\bcrypt gyp ERR! node -v v0.12.2 gyp ERR! node-gyp -v v1.0.3 gyp ERR! not ok npm ERR! Windows_NT 6.3.9600 npm ERR! argv "D:\\Program Files\\nodejs\\\\node.exe" "D:\\Program Files\\nodejs \\node_modules\\npm\\bin\\npm-cli.js" "install" "bcrypt" "--save" npm ERR! node v0.12.2 npm ERR! npm v2.7.4 npm ERR! code ELIFECYCLE npm ERR! bcrypt@0.8.3 install: `node-gyp rebuild` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the bcrypt@0.8.3 install script ‘node-gyp rebuild‘. npm ERR! This is most likely a problem with the bcrypt package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! node-gyp rebuild npm ERR! You can get their info via: npm ERR! npm owner ls bcrypt npm ERR! There is likely additional logging output above. npm ERR! Please include the following file with any support request: npm ERR! G:\nodejs\moviesite\npm-debug.log

安装python解决，python(v2.7 recommended, v3.x.x is not supported) 
下载：

在此解决方案中一次生成一个项目。若要启用并行生成，请添加“/m”开关。 
MSBUILD : error MSB3428: 未能加载 Visual C++ 组件“VCBuild.exe”。要解决此问题，， 
1) 安装 .NET Fram 
ework 2.0 SDK；2) 安装 Microsoft Visual Studio 2005；或 3) 如果将该组件安装到了 
其他位置，请将其位置添加到系统 
路径中。 [G:\nodejs\moviesite\node_modules\bcrypt\build\binding.sln] 
gyp ERR! build error

如图： 

需要安装Microsoft Visual Studio Express 2013 for Windows Desktop 
(版本应该不限制，我安装的是上边的版本)

安装成功，但是出现了警告，警告不影响bcrypt的使用 

Windows环境下npm install常见错误