Question

from tkinter import *

class GameBoard(Frame):
  def __init__(self):
    top = Toplevel()
    Frame.__init__(self)
    self.master.title("test")
    self.grid()
    #button frame
    self.__buttonPane = Frame(self)
    self.__buttonPane.grid()
    #buttons
    self.__buttonA1 = Button(self.__buttonPane,text = "A1",command = self._test("A"))
    self.__buttonA1.grid()

 def _test(self,test):
    if self.__buttonA1["state"] == NORMAL:
       print(test)


def main():
  GameBoard().mainloop()

main()

This code will not work due to the variable and if I remove the variable test and make it

from tkinter import *

class GameBoard(Frame):
  def __init__(self):
    top = Toplevel()
    Frame.__init__(self)
    self.master.title("test")
    self.grid()
    #button frame
    self.__buttonPane = Frame(self)
    self.__buttonPane.grid()
    #buttons
    self.__buttonA1 = Button(self.__buttonPane,text = "A1",command = self._test)
    self.__buttonA1.grid()

  def _test(self):
    if self.__buttonA1["state"] == NORMAL:
      print("hi")

def main():
  GameBoard().mainloop()

main()

How would I fix my code so it would allow for input of a variable?
This is just a test I am doing so I can make it work in a much bigger code.

Answer 1

When you specify command = self._test, self._test is a function that will be called. self._test("A") is not a function, it’s a call to a function (that returns None because there’s no return statement in the definition).

You can write ‘a function that calls self._test("A") as either lambda: self._test("A"), or functools.partial(self._test, "A"), or explicitly in GameBoard.__init__:

def _f():
    self._test("A")
self.__buttonA1 = Button(self.__buttonPane,text = "A1",command = _f)