I would like to understand how a button is working using lambda. I have the following Python code: from tkinter import * def comando_click(mensagem): print(mensagem) menu_inicial = Tk() menu_inicial.geometry("500x250+200+200") botao = Button(menu_inicial, text = "Executar", command=comando_click("Nova_Mensagem")) botao.pack() menu_inicial.mainloop() But my button doesn't work when I click on it, it only shows the print once in the console when I run the code, I added some prints here in the question: Problem Picture one Well it seems that when I use the Lambda function in the button it works and I really would like to know why. Lambda working button Picture one I just added to the button the lambda : botao = Button(menu_inicial, text = "Executar", command=lambda:comando_click("Nova_Mensagem")) Lambda working button Picture two Why with lambda it works? Shouldn't it work without lambda too since lambda is basically a anonymous function? Continue reading...
