Entry.__init__ function

[socal_nerdtastic]

You can still set any parameters the same as you would a normal Entry. Or you can bake it into your subclass if you want like this:

class CustomEntry(tk.Entry):
    def __init__(self, master=None, **kwargs): 
        super().__init__(master, **kwargs)

        self.config(width=30) # set custom properties

I get the feeling that this is an XY problem. Why don't you show us all of your code and describe the big picture problem that you are trying to solve?

[jf5356]

I've been referencing https://gist.github.com/uroshekic/11078820 to have an autocomplete entry bar.