How can I dynamically change the color of a button in Tkinter?

How can I d开发者_运维技巧ynamically change the background color of a button in Tkinter ?

It only works when I initialize the button:

self.colorB = tk.Button(self.itemFrame, text="", bg="#234", width=10, command=self.pickColor)

I've tried this:

   self.colorB.bg = "#234"

but it doesn't work.. thanks

Use the configure method

self.colorB.configure(bg = "#234")

For the life of me, I couldn't get it to work just using the configure method. What finally worked was setting the desired color (in my case, of a button) to a StringVar() (directly to the get()), and then using the config on the button too.

I wrote a very general example for the use case I need the most (which is a lot of buttons, where I need references to them (tested in Python 2 and 3):

Python 3:

import tkinter as tk

Python 2:

import Tkinter as tk

Code

root = tk.Tk()
parent = tk.Frame(root)

buttonNames = ['numberOne','numberTwo','happyButton']
buttonDic = {}
buttonColors = {}

def change_color(name):
    buttonColors[name].set("red")
    buttonDic[name].config(background=buttonColors[name].get())

for name in buttonNames:
    buttonColors[name] = tk.StringVar()
    buttonColors[name].set("blue")
    buttonDic[name] = tk.Button(
            parent,
            text = name,
            width = 20,
            background = buttonColors[name].get(),
            command= lambda passName=name: change_color(passName)
            )

parent.grid(row=0,column=0)
for i,name in enumerate(buttonNames):
    buttonDic[name].grid(row=i,column=0)

root.mainloop()