如何从内存中清除Matplotlib图

Question

所以我早些时候运行代码并收到以下警告：

Warning (from warnings module):
  File "<string>", line 558
RuntimeWarning: More than 20 figures have been opened. Figures created through 
the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly 
closed and may consume too much memory. (To control this warning, see the rcParam
`figure.max_open_warning`).

Warning (from warnings module):
  File "<string>", line 665
RuntimeWarning: More than 20 figures have been opened. Figures created through 
the pyplot interface (`matplotlib.pyplot.figure`) are retained until explicitly 
closed and may consume too much memory. (To control this warning, see the rcParam 
`figure.max_open_warning`).

我不会说谎，我很粗心，无论如何仍在运行它，而忽略了警告。 现在，每当我尝试运行脚本时，我的python shell都不会运行脚本。

因此，我试图从内存中删除图形，以允许我再次运行脚本。

我尝试了以下操作，但仍然无法运行代码：

1. plt.clf()
2. plt.cla()
3. f = plt.figure() f.clear() plt.close(f)
4. plt.close('all')
5. matplotlib.pyplot.figure().clear() matplotlib.pyplot.close()

如何解决此问题？

Answer 1

import matplotlib._pylab_helpers as pylhelp

pylhelp.Gcf().destroy_all()

尽管这可以满足您的需求，但它不是受支持的界面，并且可能已过时。我不知道这样做的其他方式，这是我推荐的唯一原因。