embedding plot in tk upgedatet

.vscode/settings.json

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+{
+    "python.pythonPath": "C:\\Users\\server2\\Anaconda3\\python.exe"
+}

matplot_in_tk.py

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+## https://matplotlib.org/examples/user_interfaces/embedding_in_tk.html
+import matplotlib
+matplotlib.use('TkAgg')
+
+
+
+from numpy import arange, sin, pi
+from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2Tk
+# implement the default mpl key bindings
+from matplotlib.backend_bases import key_press_handler
+
+
+from matplotlib.figure import Figure
+
+import sys
+if sys.version_info[0] < 3:
+    import Tkinter as Tk
+else:
+    import tkinter as Tk
+
+root = Tk.Tk()
+root.wm_title("Embedding in TK")
+
+
+f = Figure(figsize=(5, 4), dpi=100)
+a = f.add_subplot(111)
+t = arange(0.0, 3.0, 0.01)
+s = sin(2*pi*t)
+
+a.plot(t, s)
+
+
+# a tk.DrawingArea
+canvas = FigureCanvasTkAgg(f, master=root)
+canvas.draw()
+canvas.get_tk_widget().pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)
+
+toolbar = NavigationToolbar2Tk(canvas, root)
+toolbar.update()
+canvas._tkcanvas.pack(side=Tk.TOP, fill=Tk.BOTH, expand=1)
+
+
+def on_key_event(event):
+    print('you pressed %s' % event.key)
+    key_press_handler(event, canvas, toolbar)
+
+canvas.mpl_connect('key_press_event', on_key_event)
+
+
+def _quit():
+    root.quit()     # stops mainloop
+    root.destroy()  # this is necessary on Windows to prevent
+                    # Fatal Python Error: PyEval_RestoreThread: NULL tstate
+
+button = Tk.Button(master=root, text='Quit', command=_quit)
+button.pack(side=Tk.BOTTOM)
+
+Tk.mainloop()
+# If you put root.destroy() here, it will cause an error if
+# the window is closed with the window manager.