python - Detect which figure was closed with Matplotlib -

im using matplotlib embedded in gui application using qt4 backend.

i need store list of figures user plots , keeps open ie multiple figures able plotted separately different clicks of plot button.

however when user closes figure need remove list of figures.

how tell figure closed?

i using event handler detect figure has been closed cannot tell one.

here trivial example code:

from __future__ import print_function import matplotlib.pyplot plt import numpy np  figs = [] fignum = len(figs)  def handle_close(evt):     evt.canvas.figure.axes[0].has_been_closed = true     print ('closed figure')  fig = plt.figure() figs.append(fig)   ax = figs[fignum].add_subplot(1, 1, 1) ax.has_been_closed = false # fig2 = plt.figure() # ax2 = fig2.add_axes([0.15, 0.1, 0.7, 0.3])  t = np.arange(0.0, 1.0, 0.01) s = np.sin(2*np.pi*t) line, = ax.plot(t, s, color='blue', lw=2)   # fig2 = plt.figure() # figs.append(fig2) # fig2.canvas.mpl_connect('close_event', handle_close) fig.canvas.mpl_connect('close_event', handle_close)  plt.show() print (ax.has_been_closed) 

the evt passed handler has member canvas, in turn has member figure, of course figure event refers to.

so if want remove figure list, do

figs.remove(evt.canvas.figure) 

if want figure number, access

evt.canvas.figure.number 

and name from

evt.canvas.figure._label 

however, leading _ means shouldn't rely on that.