I used fig.canvas.set_window_title('The title') with fig obtained with pyplot.figure() , and it worked well too:
import matplotlib.pyplot as plt ... fig = plt.figure(0) fig.canvas.set_window_title('Window 3D')

(It seems .gcf() and .figure() does a similar job here.)
khaz Jun 11 '16 at 10:53 on 2016-06-11 10:53
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