New Demo - Execute Py - shows link between global setting of interpreter and the exec API call execute_py_file

DemoPrograms/Demo_Execute_Py.py

@@ -0,0 +1,54 @@
+"""
+    Demo Execute Py - Using the PySimpleGUI Execute APIs
+
+    Creating a virtual environment using PySimpleGUI & sg.execute_py_file()
+
+    This Demo's purpose is to show the link between Execute APIs to the Global User Settings
+
+    The function execute_py_file() uses the interpreter set in the Global Settings
+    To see and change global settings, call main_global_pysimplegui_settings()
+    Or you can use the "Global Settings" button found in the sg.main()
+
+    If you have set an interpreter in your global settings, then this is what will be
+        used when calling execute_py_file.  It nothing is set, then the default python
+        interpreter will be used
+
+    Demo also shows another handy function, main_get_debug_data, which returns a string with
+        version numbers for Python tkinter, PySimpleGUI
+
+    http://www.PySimpleGUI.org
+    Copyright 2021 PySimpleGUI
+"""
+
+import PySimpleGUI as sg
+
+
+def main():
+    # --------- Define layout and create Window -------
+    layout = [  [sg.Text('User Exec API Demo', font='_ 18')],
+                [sg.T(sg.main_get_debug_data(True))],
+                [sg.T('Python Version', text_color='yellow'),
+                 sg.T(f'{sg.sys.version_info.major}.{sg.sys.version_info.minor}.{sg.sys.version_info.micro}', text_color = 'yellow')],
+                [sg.B('Global Settings'), sg.B('Relaunch'), sg.B('Main'), sg.B('Refresh'), sg.Exit()],
+                ]
+
+    window = sg.Window('Execute Py File Demo', layout, keep_on_top=True, font='_ 14')
+
+    # --------- Event Loop -------
+    while True:
+        event, values = window.read()
+        if event in (sg.WIN_CLOSED, 'Exit'):
+            break
+        if event.startswith('Global'):
+            sg.main_global_pysimplegui_settings()
+        elif event == 'Relaunch':
+            sg.execute_py_file(__file__)        # Run using Global Settings to determine which python version to use
+        elif event == 'Main':
+            sg.main()
+
+    # --------- After event loop ---------
+    window.close()
+
+
+if __name__ == '__main__':
+    main()