如何从内存中清除 matplotlib 图形

Question

所以我之前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`).

不会撒谎，我当时非常粗心，并且仍然在运行它，无视警告。 现在每当我尝试运行脚本时，我的 python shell 都不会运行脚本。

所以我试图从内存中删除图表以允许我再次运行脚本。

我已经尝试了以下方法，但它仍然不允许我运行代码：

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()

我该如何解决这个问题？

Answer 1

import matplotlib._pylab_helpers as pylhelp

pylhelp.Gcf().destroy_all()

虽然这可以满足您的需求，但这不是受支持的接口，可能会过时。我不知道有任何其他方法可以做到这一点，这是我推荐它的唯一原因。