Bind only fires off once?

[WuchaDoin]

I have a combobox used with Tkinter I cannot get bind to execute appropriately. Currently I have:

1	self.ap_reason.bind("<<ComboboxChanged>>", self.Callback())

This executes the following (or should, rather):

1 2	def Callback(self):      print("here")

If I use lambda, it doesn't execute at all. If I remove lambda, then the bind executes as soon as the toplevel opens and not when changed. I've run this through debug so I can see where it's not executing the function properly - or at all. Not sure what else I should post here 'code-wise' so please feel free to ask if more information is neededed.

[metulburr]

Its been awhile since i did tkinter so excuse me for being a little off.

Do you mean ComboboxSelected?

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import tkinter as tk from tkinter import ttk   tkwindow = tk.Tk()   cbox = ttk.Combobox(tkwindow, values=[1,2,3], state='readonly') cbox.grid(column=0, row=0)   cbox.bind("<<ComboboxSelected>>", lambda event: print(f"Selected! {event}"))   tkwindow.mainloop()

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import tkinter as tk from tkinter import ttk   tkwindow = tk.Tk()   cbox = ttk.Combobox(tkwindow, values=[1,2,3], state='readonly') cbox.grid(column=0, row=0)     def callback(event):     print(f'changed: {event}')   cbox.bind("<<ComboboxSelected>>", callback)   tkwindow.mainloop()

[WuchaDoin]

Oops, yes. "ComboboxSelected". I forgot to change that back when I was trying to find a solution.

---

Mother.. I always - Always - find the solution as soon as I posted a question.
So I had to move my function down one hierarchy and add

1

lambda x:

solution:

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self.ap_reason.bind("<<ComboboxSelected>>", lambda x: Callback())   def Callback():      print("here")

[buran]

self.ap_reason.bind("<<ComboboxSelected>>", lambda x: Callback())

I think you want

1	self.ap_reason.bind("<<ComboboxSelected>>", Callback)

what you do is - call Callback, it will print (at the time when you bind) then return None and what you bind is lambda x: None