CODEWITHSUNDEEP
pythonbuttontkinter
Laura
Laura

Reputation: 53

changing buttons within tkinter

win=Tk()
level1=matrixmaker(4)

def display(x,y): 
if z["text"] == " ":
    # switch to Goodbye
    z["text"] = level1[x][y]
else:
    # reset to Hi
    z["text"] = " "


for x in range(0,4):
    for y in range(0,4):
        z=Button(win,text=" ", command=display(x,y))
        z.grid(row=x,column=y)

I have this code but I don't know how to get the display function to work. How can I call the button and change the text without it having a hardcoded variable name?

Upvotes: 0

Views: 51

Answers (1)

MrAlexBailey
MrAlexBailey

Reputation: 5289

You can't assign the command to the button with the called function (display(x, y)) because this assigned what this function returns (None) to the button's command. You need to assign the callable (display) instead.

To do this and pass arguments you'll need to use a lambda:

z = Button(win, text='')
z['command'] = lambda x=x, y=y, z=z: display(x, y, z)
z.grid(row=x, column=y)

Also, you'll want to change your display() function to accept another argument z so that the correct button gets changed (and correct the indentation):

def display(x,y,z): 
    if z["text"] == " ":
        # switch to Goodbye
        z["text"] = level1[x][y]
    else:
        # reset to Hi
        z["text"] = " "

Upvotes: 4

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