1gyp ERR! configure error 
 2gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
 3gyp ERR! stack     at failNoPython (C:\Users\esanvin\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:401:14)
 4gyp ERR! stack     at C:\Users\esanvin\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:356:11
 5gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:82:15)
 6gyp ERR! System Windows_NT 6.1.7601
 7gyp ERR! command "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\esanvin\\AppData\\Roaming\\npm\\node_modules\\npm\\node_modules\\node-gyp\\bin\\node-gyp.js" "rebuild"
 8gyp ERR! cwd C:\Users\esanvin\Desktop\multi\NodeServer\node_modules\ws
 9gyp ERR! node -v v5.5.0
10gyp ERR! node-gyp -v v3.2.1
11gyp ERR! not ok