使用 tkinter 按下按钮时，如何更改按钮的颜色？

Question

I made 100 buttons and I want to change color of button which pushed. How can I do that? Here is my code.

import tkinter as tk

def settingships():
    column = -1
    row = 0
    root = tk.Tk()
    root.title('set ships')
    root.geometry('470x310')
    for i in range(101):
        if i > 0:
            if i%10 == 1:
                row += 1 
                column = -1
            column += 1
            text=f'{i}'
            btn = tk.Button(root,text=text,command=collback(i)).grid(column=column,row=row)
    root.mainloop()


def collback(i):
    def nothing():
        btn.config(bg='#008000')

    return nothing

Answer 1

First, i is not used in collback() . Second btn is undefined in nothing() . You should pass btn to collback() instead.

In order to do that you need to replace the following line:

btn = tk.Button(root,text=text,command=collback(i)).grid(column=column,row=row)

to:

btn = tk.Button(root, text=text)
btn.grid(column=column, row=row)
btn.config(command=collback(btn))

And modify collback() as below:

def collback(btn):
    def nothing():
        btn.config(bg='#008000')
    return nothing

Or simply use lambda to replace collback() :

btn.config(command=lambda b=btn: b.config(bg='#008000'))