TypeError: edit_undo() takes 1 positional argument but 2 were given

Question

This is my edited code:

from tkinter import *

class UI:
   def __init__(self):
      self.root = Tk()
      self.text= Text(self.root)
      self.text.pack()
      self.text.bind("<Return>", self.entry.edit_undo)
      self.text.mainloop()

UI()

and when I run it it runs normally but, when diff.node_root.bind() is triggered, it shows an error that says TypeError: edit_undo() takes 1 positional argument but 2 were given. can anybody help me please?

the `diff`is the represent the instance of the class like `self`, but i use a different name :) — Alvin_Sanchez, Sep 22 '20 at 20:31
edit_undo is a built in method within Text widget class [here's the information about it](http://www.tkdocs.com/tutorial/text.html#more) — Alvin_Sanchez, Sep 23 '20 at 06:19
Please see my answer below, but also please read about [mre]. Your code is still not reproducible. You use `self.entry` but never define it — Tomerikoo, Sep 23 '20 at 07:13

score 1 · Answer 1 · answered Sep 23 '20 at 07:10

1

The functions that you pass to bind (event handlers) are expected to take one event argument. edit_undo doesn't take any arguments (except for self that is...).

If you are not interested in the actual event, you can instead pass a function that ignores it, something like:

self.text.bind("<Return>", lambda e: self.entry.edit_undo())

answered Sep 23 '20 at 07:10

Tomerikoo

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Yes i've already fix it but, its still show an error `_tkinter.TclError: nothing to undo` – Alvin_Sanchez Sep 23 '20 at 08:28
Well with that I can't really help as it depends on the state of your text widget. You will have to make sure this actually works only when there is something to undo – Tomerikoo Sep 23 '20 at 08:35

TypeError: edit_undo() takes 1 positional argument but 2 were given

1 Answers1