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サーバ上でmatplotlibを使うときのノート

Last updated at Posted at 2016-11-21

matplotlibを使ってサーバ側で作図する(savefig()など)場合、

Traceback 
...
RuntimeError: Invalid DISPLAY variable

などと怒られる場合がある。
これは、表示先のDISPLAYが設定されていないことに原因しているらしい。
解決方法1は良く見るけど、それでもダメだったときのノート。

#解決方法1

import matplotlib
matplotlib('Agg')
import matplotlib.pyplot as pet

#解決方法2

import matplotlib.pyplot as plt
plt.switch_backend('agg')
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