“Python tkinter.ttk Combobox Down Event on Mouseclick” Código de respuesta

Python tkinter.ttk Combobox Down Event on Mouseclick

# To get it at the first mouse click:

w.event_generate('<Down>', when='head')

# default of Event Generate is to append the generated Event to the Event Chain 
# (put it at its end, value = 'tail'). Changing to when='head' gives your desired behaviour.