Assign return-value to unnamed, clicked button

[Jogi]

How can I assign a value that is returned from a function to an unnamed button that just called the function?

def felder_updaten(m):
	for i in range(9):
		for j in range(9):
			Button(mainframe, text=m[i][j], command=insert_number).grid(row=i, column=j, sticky=W+E)

m is a 9x9 matrix (btw, it's a Sudoku-solver).
Or, if it can't be done that way, how can I dynamically name 81 buttons (like btn1, btn2, btn3...btn81)

Thanks a lot!

[bvdet]

What do you mean, "assign a value that is returned from a function to an unnamed button that just called the function"? Do you mean that you want to replace the text in the button? Create a handler for the buttons and attach an event binding to each button with widget method bind(). It's easier than it sounds.

import Tkinter
import random
"""Start with a grid of buttons with blank labels. When a button is
clicked, change the text to a random number between 1 and 100."""

textFont3 = ("Arial", 12, "bold")

class App(Tkinter.Tk):
    def __init__(self, cols, rows):
        Tkinter.Tk.__init__(self)
        self.title("Grid of Buttons")
        self.cols = cols
        self.rows = rows
        
        self.mainFrame = Tkinter.Frame(self)
        self.mainFrame.grid()
        self.create_buttons()

    def create_buttons(self):
        for i in range(self.cols):
            for j in range(self.rows):
                btn = Tkinter.Button(self.mainFrame,text="", width=4)
                btn.grid(row=j, column=i)
                btn.bind(sequence="<ButtonRelease-1>", func=self.handler)

    def handler(self, event):
        event.widget.configure(text=random.randint(1,100))

app = App(6,6)
app.mainloop()

[Jogi]

That's it - nearly.
Is it possible to give additional parameters to the func=self.handl er ? (in addition to 'event')... i tried 'func=self.hand ler(matrix,i,j) ', but then the event is missing.

Or if not, is it possible to give the (new) text of the button as parameter, so that the new number can be inserted into the matrix?

[bvdet]

Most definitely! It is a bit more complicated. You can create a different handler for each button making use of default arguments. Example:

import Tkinter
import random
"""Start with a grid of buttons with blank labels. When clicked, change the
text to a random number between 1 and 100."""

textFont3 = ("Arial", 12, "bold")

class App(Tkinter.Tk):
    def __init__(self, cols, rows):
        Tkinter.Tk.__init__(self)
        self.title("Grid of Buttons")
        self.cols = cols
        self.rows = rows
        
        self.mainFrame = Tkinter.Frame(self)
        self.mainFrame.config(padx='3.0m', pady='3.0m')
        self.mainFrame.grid()
        # initialize button array
        self.buttonList = [[None for j in range(cols)] for i in range(rows)]
        self.create_buttons()

    def create_buttons(self):
        for i in range(self.cols):
            for j in range(self.rows):
                btn = Tkinter.Button(self.mainFrame,text="",
                                 anchor='center',
                                 bd=3,
                                 bg='#ffffff000',
                                 fg="#000000fff",
                                 activebackground = "#000000fff",
                                 activeforeground = "#ffffff000",
                                 font=textFont3,
                                 padx='1.0m',
                                 pady='1.0m',
                                 relief='raised',
                                 state='normal', width=6)
                self.buttonList[i].append(btn)

                btn.grid(row=j, column=i)
                def handler(event, i=i, j=j):
                    return self.__buttonHandler(event, i, j)
                btn.bind(sequence="<ButtonRelease-1>", func=handler)

    def __buttonHandler(self, event, i, j):
        event.widget.configure(text=", ".join([str(obj) for obj in [i, j, random.randint(1,100)]]))

app = App(6,6)
app.mainloop()

[Jogi]

Ok, i think that might work :D
Thank you!