Change command Method for Tkinter Button in Python


I create a new Button object but did not specify the command option upon creation. Is there a way in Tkinter to change the command (onclick) function after the object has been created?

By : Cristian


Though Eli Courtwright's program will work fine¹, what you really seem to want though is just a way to reconfigure after instantiation any attribute which you could have set when you instantiated². How you do so is by way of the configure() method.

from Tkinter import Tk, Button

def goodbye_world():
    print "Goodbye World!\nWait, I changed my mind!"
    button.configure(text = "Hello World!", command=hello_world)

def hello_world():
    print "Hello World!\nWait, I changed my mind!"
    button.configure(text = "Goodbye World!", command=goodbye_world)

root = Tk()
button = Button(root, text="Hello World!", command=hello_world)


¹ "fine" if you use only the mouse; if you care about tabbing and using [Space] or [Enter] on buttons, then you will have to implement (duplicating existing code) keypress events too. Setting the command option through .configure is much easier.

² the only attribute that can't change after instantiation is name.

By : akdom

Sure; just use the bind method to specify the callback after the button has been created. I've just written and tested the example below. You can find a nice tutorial on doing this at

from Tkinter import Tk, Button

root = Tk()
button = Button(root, text="Click Me!")

def callback(event):
    print "Hello World!"

button.bind("<Button-1>", callback)

Create an other schema and grant it all on your data schema. Implment VPD on your new schema so that each and every query will have the predicate allowing selection of the non-deleted row only appended to it.

By : adsm

This video can help you solving your question :)
By: admin