How to bind again after unbinding a functiion in tkinter?

Question

I am trying to bind a button to a different function after the user selects some number of points on the image with another function. Currently, I am doing like this-

canvas.bind("<Button-1>", func1)
canvas.unbind("<Button-1>")
canvas.bind("<Button-1>", func2)

This does not solve my problem as only func2 is executing. I have also tried adding the unbind statement to func1 and func2 (which runs after some condition is satisfied) but same thing is happening. Is there a way to make this run sequentially so that I can bind with func1 -> unbind func1 -> bind with func2 -> unbind func2.

I want to do the point selection in one image only without putting the image again on canvas. Also, is there any better way to approach this?

Answer 1

Take a look at this example, where once you click twice on the root window, then func2 will be used.

from tkinter import *

root = Tk()

count = 0
def func1(event):
    global count
    count += 1
    print('FUNC1')
    
    if count == 2:
        root.unbind('<Button-1>')
        root.bind('<Button-1>',func2)
        count = 0

def func2(event):
    print('FUNC2') #you can create similar logic to switch back to func1 here too 

root.bind('<Button-1>',func1)

root.mainloop()

Using a counter is a easy way to do this, not sure if this is what your looking for, but you can get an idea from here.