How Can I Pass Arguments to Tkinter Button Commands Without Premature Execution?

Passing Arguments to Button Commands in Tkinter

When creating buttons in Tkinter, it can be useful to pass arguments to the command function. The provided code:

import Tkinter as Tk
win = Tk.Toplevel()
frame = Tk.Frame(master=win).grid(row=1, column=1)
button = Tk.Button(master=frame, text='press', command=action)

where action is the method called upon pressing the button, suggests that arguments may be passed directly as parameters to the button's command:

button = Tk.Button(master=frame, text='press', command=action(someNumber))

However, this will execute action immediately, rendering the button useless. To resolve this:

Solution Using Lambda

A lambda allows argument binding without an explicit wrapper method or modifying action:

button = Tk.Button(master=frame, text='press', command= lambda: action(someNumber))

This binds the argument effectively and ensures action is invoked correctly upon button press.

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