获取matplotlib中的数字列表

Question

我想要:

pylab.figure()
pylab.plot(x)
pylab.figure()
pylab.plot(y)
# ...
for i, figure in enumerate(pylab.MagicFunctionReturnsListOfAllFigures()):
  figure.savefig('figure%d.png' % i)

什么是返回pylab中当前数字列表的神奇函数？

网络搜索没有帮助......

Answer 1

Pyplot有get_fignums方法,返回图号列表.这应该做你想要的:

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(100)
y = -x

plt.figure()
plt.plot(x)
plt.figure()
plt.plot(y)

for i in plt.get_fignums():
    plt.figure(i)
    plt.savefig('figure%d.png' % i)

Answer 2

以下单行检索现有数据列表:

import matplotlib.pyplot as plt
figs = list(map(plt.figure, plt.get_fignums()))

Answer 3

编辑:正如Matti Pastell的解决方案所示,有一种更好的方法:使用plt.get_fignums().

import numpy as np
import pylab
import matplotlib._pylab_helpers

x=np.random.random((10,10))
y=np.random.random((10,10))
pylab.figure()
pylab.plot(x)
pylab.figure()
pylab.plot(y)

figures=[manager.canvas.figure
         for manager in matplotlib._pylab_helpers.Gcf.get_all_fig_managers()]
print(figures)

# [<matplotlib.figure.Figure object at 0xb788ac6c>, <matplotlib.figure.Figure object at 0xa143d0c>]

for i, figure in enumerate(figures):
    figure.savefig('figure%d.png' % i)