PySimpleGUI/Demo_Keyboard.py

import PySimpleGUI as sg

# Recipe for getting keys, one at a time as they are released
# If want to use the space bar, then be sure and disable the "default focus"

with sg.FlexForm("Keyboard Test", return_keyboard_events=True, use_default_focus=False) as form:
    layout = [[sg.Text("Press a key or scroll mouse")],
              [sg.Text("", size=(18,1), key='text')],
              [sg.SimpleButton("OK", key='OK')]]

    form.Layout(layout)
    # ---===--- Loop taking in user input --- #
    while True:
        button, value = form.Read()
        text_elem = form.FindElement('text')
        if button in ("OK", None):
            print(button, "exiting")
            break
        if len(button) == 1:
            text_elem.Update(value='%s - %s' % (button, ord(button)))
        if button is not None:
            text_elem.Update(button)