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GraphvizでExecutableNotFound(~systems' PATH)エラーが出るときの対処法

Last updated at Posted at 2019-04-27

##問題
オライリーの良書『Pythonではじめる機械学習』の決定木のあたりをやっていたら、突如『ExecutableNotFound: failed to execute ['dot', '-Tpng', '-O', 'tmp'], make sure the Graphviz executables are on your systems' PATH』とパスが通ってないっぽいエラーが出たので、対処法を書きます。
※Jupyter Notebook使用を想定
##対処法

  1. Anaconda Promptで『conda install python-graphviz』を実行
  2. 環境変数Pathに『C:\Users\●●●●(ユーザ名)\Anaconda3\pkgs\graphviz-2.38-hfd603c8_2\Library\bin\graphviz』を追加
  3. PC再起動

これでいけるはず。

参考サイト

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