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pyenv利用環境下でnpm installでpython2周りのエラーが出た時

Posted at 2017-09-25

> node-gyp rebuild

gyp ERR! configure error 
gyp ERR! stack Error: Command failed: pyenv: python2: command not found
gyp ERR! stack 
gyp ERR! stack The `python2' command exists in these Python versions:
gyp ERR! stack   2.7.9
gyp ERR! stack 
gyp ERR! stack 
gyp ERR! stack     at ChildProcess.exithandler (child_process.js:637:15)
gyp ERR! stack     at ChildProcess.EventEmitter.emit (events.js:98:17)
gyp ERR! stack     at maybeClose (child_process.js:743:16)
gyp ERR! stack     at Socket.<anonymous> (child_process.js:956:11)
gyp ERR! stack     at Socket.EventEmitter.emit (events.js:95:17)
gyp ERR! stack     at Pipe.close (net.js:465:12)
gyp ERR! System Darwin 16.7.0

python2へのPATHが通っていないのが原因らしい。
pyenvで2系、3系のそれぞれをglobalに設定してやれば解決する。

pythonコマンドで python2系を使いたい場合

$ pyenv global 2.7.9 3.4.3
$ python -V
Python 2.7.9

pythonコマンドで python3系を使いたい場合

$ pyenv global 3.4.3 2.7.9 
$ python -V
Python 3.4.3

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