diff --git a/lib/matplotlib/_pylab_helpers.py b/lib/matplotlib/_pylab_helpers.py
index 26ba7a171244..27904dd84b6f 100644
--- a/lib/matplotlib/_pylab_helpers.py
+++ b/lib/matplotlib/_pylab_helpers.py
@@ -53,18 +53,17 @@ def destroy(cls, num):
It is recommended to pass a manager instance, to avoid confusion when
two managers share the same number.
"""
- if all(hasattr(num, attr) for attr in ["num", "_cidgcf", "destroy"]):
+ if all(hasattr(num, attr) for attr in ["num", "destroy"]):
manager = num
if cls.figs.get(manager.num) is manager:
cls.figs.pop(manager.num)
- else:
- return
else:
try:
manager = cls.figs.pop(num)
except KeyError:
return
- manager.canvas.mpl_disconnect(manager._cidgcf)
+ if hasattr(manager, "_cidgcf"):
+ manager.canvas.mpl_disconnect(manager._cidgcf)
manager.destroy()
gc.collect(1)
diff --git a/lib/matplotlib/backend_bases.py b/lib/matplotlib/backend_bases.py
index fe8cc66913cc..816db303ff65 100644
--- a/lib/matplotlib/backend_bases.py
+++ b/lib/matplotlib/backend_bases.py
@@ -3294,8 +3294,8 @@ def _update_view(self):
def configure_subplots(self, *args):
plt = _safe_pyplot_import()
- tool = plt.subplot_tool(self.canvas.figure)
- tool.figure.canvas.manager.show()
+ self.subplot_tool = plt.subplot_tool(self.canvas.figure)
+ self.subplot_tool.figure.canvas.manager.show()
def save_figure(self, *args):
"""Save the current figure."""
diff --git a/lib/matplotlib/backends/backend_nbagg.py b/lib/matplotlib/backends/backend_nbagg.py
index 9eb076d9ec44..b921aa0a1d6e 100644
--- a/lib/matplotlib/backends/backend_nbagg.py
+++ b/lib/matplotlib/backends/backend_nbagg.py
@@ -231,7 +231,12 @@ def new_figure_manager_given_figure(num, figure):
if is_interactive():
manager.show()
figure.canvas.draw_idle()
- canvas.mpl_connect('close_event', lambda event: Gcf.destroy(manager))
+
+ def destroy(event):
+ canvas.mpl_disconnect(cid)
+ Gcf.destroy(manager)
+
+ cid = canvas.mpl_connect('close_event', destroy)
return manager
@staticmethod
diff --git a/lib/matplotlib/pyplot.py b/lib/matplotlib/pyplot.py
index 18e1739cab6d..73e77f6f0174 100644
--- a/lib/matplotlib/pyplot.py
+++ b/lib/matplotlib/pyplot.py
@@ -1546,7 +1546,8 @@ def subplot_tool(targetfig=None):
"""
Launch a subplot tool window for a figure.
- A `matplotlib.widgets.SubplotTool` instance is returned.
+ A `matplotlib.widgets.SubplotTool` instance is returned. You must maintain
+ a reference to the instance to keep the associated callbacks alive.
"""
if targetfig is None:
targetfig = gcf()
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