Hey guys, I'm in an introductory computer science class that deals with Python. We're assigned to create a dice-rolling program using Tkinter, and I have the interface pretty much down, but I'm having trouble linking it to the dice-roller. Here it is.

import random
import Tkinter

win = Tkinter.Tk()
win.title("Die Roller")
class die():
    import Tkinter
    def __init__(self,ivalue,parent):
        self.value = ivalue
        self.display = Tkinter.Label(parent,relief='ridge', borderwidth=2, text=str(self.value))
    def roll(self):
        self.value = random.randint(1,6)
        self.display.config(text=str(self.value))
def rollin():
    d1.roll
    d2.roll
    d3.roll
row1 = Tkinter.Frame(win)
row2 = Tkinter.Frame(win)
d1 = die(1,row1)
d2 = die(1,row1)
d3 = die(1,row1)
d1.display.pack(side="left")
d2.display.pack(side="left")
d3.display.pack(side="left")
row1.pack()
rolldice = Tkinter.Button(row2, command=rollin(), text = "Roll")
rolldice.pack()
row2.pack()
win.mainloop()

When I click roll, nothing pops up as an output. Not quite sure what I'm doing wrong here. (Bear in mind Tkinter was just introduced to us a few days ago.)

What that post means is, you execute the return from rollin (which is 'None') because of the parens. It should be
rolldice = Tkinter.Button(row2, command=rollin, text = "Roll")
See Click Here for info on bindings and callbacks.

Also, you do not include the parens when you call dx.roll within rollin() so it does nothing. Finally, I like to use Tkinter variables because the widget is updated when the variables change. Otherwise you may have to call update_idletasks().

import random
import Tkinter

win = Tkinter.Tk()
win.title("Die Roller")
class die():
    import Tkinter
    def __init__(self,ivalue,parent):
        win.geometry("75x50+10+10")
        self.label_var = Tkinter.IntVar()
        self.label_var.set(ivalue)
        self.display = Tkinter.Label(parent,relief='ridge', borderwidth=2, 
                       textvariable=self.label_var)
        self.display.pack(side='left')

    def roll(self):
        value = random.randint(1,6)
        self.label_var.set(value)
        print "label_var =", value

def rollin():
    d1.roll()
    d2.roll()
    d3.roll()


row1 = Tkinter.Frame(win)
row2 = Tkinter.Frame(win)
d1 = die(1,row1)
d2 = die(1,row1)
d3 = die(1,row1)
##d1.display.pack(side="left")
##d2.display.pack(side="left")
##d3.display.pack(side="left")
row1.pack()
rolldice = Tkinter.Button(row2, command=rollin, text = "Roll")
rolldice.pack()
row2.pack()
win.mainloop()

Edited 4 Years Ago by woooee

... as long as the functions value is not function reference True. Unlikely for starting programmer, though.

This article has been dead for over six months. Start a new discussion instead.