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Fail to create pixmap with Tk_GetPixmap in TkImgPhotoInstanceSetSize

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概要

下記の様なコードでメモリエラーが出ました。

sample.py
import matplotlib
import matplotlib.pyplot as plt

#グラフループ
for i in range(1000):
    #グラフオブジェクト
    fig, ax = plt.subplots()
    #描画
    ax.plot(x,y)
    #出力
    fig.savefig(path_file)
    #図形クリア
    plt.clf()
    #window閉じる
    plt.close()

エラー内容

Fail to create pixmap with Tk_GetPixmap in TkImgPhotoInstanceSetSize

原因

fig.savefigが原因の様です。

解決方法

matplotlib.use('Agg') を追記して、解決しました。

sample.py
import matplotlib
import matplotlib.pyplot as plt

#
matplotlib.use('Agg')  #追記

#グラフループ
for i in range(1000):
    #グラフオブジェクト
    fig, ax = plt.subplots()
    #描画
    ax.plot(x,y)
    #出力
    fig.savefig(path_file)
    #図形クリア
    plt.clf()
    #window閉じる
    plt.close()

参照
plt.close() だけではメモリが解放されない場合がある

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