Major update of all demo programs to use new PEP8 bindings, etc

DemoPrograms/Demo_Matplotlib_Animated_Scatter.py

@@ -1,6 +1,4 @@
 #!/usr/bin/env python
-import PySimpleGUI as sg
-
 import PySimpleGUI as sg
 from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
 import matplotlib.pyplot as plt
@@ -12,9 +10,6 @@ def draw_figure(canvas, figure):
     figure_canvas_agg.get_tk_widget().pack(side='top', fill='both', expand=1)
     return figure_canvas_agg
 
-
-
-
 def main():
     # define the form layout
     layout = [[sg.Text('Animated Matplotlib', size=(40, 1), justification='center', font='Helvetica 20')],
@@ -24,7 +19,7 @@ def main():
     # create the form and show it without the plot
     window = sg.Window('Demo Application - Embedding Matplotlib In PySimpleGUI', layout, finalize=True)
 
-    canvas_elem = window.FindElement('-CANVAS-')
+    canvas_elem = window['-CANVAS-']
     canvas = canvas_elem.TKCanvas
     # draw the intitial scatter plot
     fig, ax = plt.subplots()
@@ -32,7 +27,7 @@ def main():
     fig_agg = draw_figure(canvas, fig)
 
     while True:
-        event, values = window.Read(timeout=10)
+        event, values = window.read(timeout=10)
         if event in ('Exit', None):
             exit(69)
 
@@ -45,6 +40,7 @@ def main():
             ax.scatter(x, y, c=color, s=scale, label=color, alpha=0.3, edgecolors='none')
         ax.legend()
         fig_agg.draw()
+    window.close()
 
 
 if __name__ == '__main__':