upstream/ipython Commit - r11356:2a49eafc

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# execution. Also sets the _draw_called flag, signaling that there will be

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# execution. Also sets the _draw_called flag, signaling that there will be

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# something to send. At the end of the code execution, a separate call to

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# something to send. At the end of the code execution, a separate call to

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# flush_figures() will act upon these values

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# flush_figures() will act upon these values

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manager = Gcf.get_active()

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fig = Gcf.get_active().canvas.figure

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if manager is None:

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return

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fig = manager.canvas.figure

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# Hack: matplotlib FigureManager objects in interacive backends (at least

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# Hack: matplotlib FigureManager objects in interacive backends (at least

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# in some of them) monkeypatch the figure object and add a .show() method

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# in some of them) monkeypatch the figure object and add a .show() method

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                 # execution.  Also sets the _draw_called flag, signaling that there will be
                 # something to send.  At the end of the code execution, a separate call to
                 # flush_figures() will act upon these values
+                manager = Gcf.get_active()
-                fig = Gcf.get_active().canvas.figure
+                if manager is None:
+                    return
+                fig = manager.canvas.figure
                 # Hack: matplotlib FigureManager objects in interacive backends (at least
                 # in some of them) monkeypatch the figure object and add a .show() method