I am trying to write tkinter
code that calls a function either when a button is clicked or when enter is clicked when the button is in focus. I have the following code:
import tkinter as tk
m = tk.Tk(className="My window")
def callback():
print("Ice cream weather")
butt = tk.Button(m, text="My button", width=25, command=callback)
butt.grid()
butt.focus_set()
butt.bind('<Return>', callback)
m.mainloop()
But when I run it and press Enter
, I get the following error:
Traceback (most recent call last):
File "C:\Users\chiller\AppData\Local\Programs\Python\Python37\lib\tkinter\__init__.py", line 1705, in __call__
return self.func(*args)
TypeError: callback() takes 0 positional arguments but 1 was given
I found a solution, which I posted below, but I am wondering if there is a simpler or neater fix.
A way to solve this is to set the function up to take in a dummy parameter, and set a default value for when it isn't passed (ie for button click, which passes 0 arguments). This is just changing the line
def callback():
To
def callback(pointless=None):
This gives the extra parameter from pressing Enter
a place to go, while not requiring it for a button push.
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