Passing Argument to function python

Question

from Tkinter import *

class Program:    
    def __init__(self):
        b = Button(text="click me", command=self.callback("1"))
        b.pack()

    def callback(self,s):
        print "clicked!"

program = Program()

mainloop()

why execut function befor click button ?? */

What function do you think is executed? Why do you think it should *not* be executed? Do you understand who Tkinter works? — , Nov 25 '14 at 07:58
I want to pass a variable Based on the value of calls function when the button is pressed — Ala'a Hamda, Nov 25 '14 at 08:01
possible duplicate of [passing argument in python Tkinter button command](http://stackoverflow.com/questions/6920302/passing-argument-in-python-tkinter-button-command) — fhdrsdg, Nov 25 '14 at 08:24

score 0 · Accepted Answer · answered Nov 25 '14 at 09:00

You should pass a function reference to command argument . Otherwise you execute the function in place.

b = Button(text="click me", command=self.callback)
# Or if you want to pass parameters
b = Button(text="click me", command=lambda: self.callback("1"))

Passing Argument to function python

1 Answers1