ExecutableNotFound: failed to execute ['dot', '-Tsvg'], make sure the Graphviz executables are on yo

问题发生 在使用xgboost自带功能绘图的时候出现了问题 ExecutableNotFound: failed to execute ['dot', '-Tsvg'], make sure the Graphviz executables are on your systems' PATH 寻找原因 原因：graphviz本身是一个软件，需要额外下载，并将其bin加入环境变量之中。 解决 下载工

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