How to pass an argument to event handler in tkinter?
You can use lambda to define an anonymous function, such as:
data={"one": 1, "two": 2}widget.bind("<ButtonPress-1>", lambda event, arg=data: self.on_mouse_down(event, arg))Note that the arg passed in becomes just a normal argument that you use just like all other arguments:
def on_mouse_down(self, event, arg): print(arg)
I think that in most cases you don't need any argument to a callback because the callback can be an instance method which can access the instance members:
from Tkinter import *class MyObj: def __init__(self, arg): self.arg = arg def callback(self, event): print self.argobj = MyObj('I am Obj')root = Tk()btn=Button(root, text="Click")btn.bind('<Button-1>', obj.callback)btn.pack()root.mainloop()But I think the functools solution proposed by Philipp is also very nice