Bind 'Enter' on complicated Tkinter code

Question

I am trying to make some tweaks to code that I found on GitHub. The tkinter gui works perfectly but I want to bind the enter button to the 'Get Response' button:

class TkinterGUIExample(tk.Tk):

    def initialize(self):
        '''
        Set window layout.
        '''
        self.grid()

        self.usr_input = ttk.Entry(self, state='normal')
        self.usr_input.grid(column=0, row=0, sticky='nesw', padx=3, pady=3)

        self.respond = ttk.Button(self, text='Get Response', command=self.get_response)
        self.respond.grid(column=1, row=0, sticky='nesw', padx=3, pady=3)

        self.conversation_lbl = ttk.Label(self, anchor=tk.E, text='Conversation:')
        self.conversation_lbl.grid(column=0, row=1, sticky='nesw', padx=3, pady=3)

        self.conversation = ScrolledText.ScrolledText(self, state='disabled')
        self.conversation.grid(column=0, row=2, columnspan=2, sticky='nesw', padx=3, pady=3)

So I know where my button is, but I don't know how, when, or where to bind it, while using the same syntax.

My full code can be found here: https://github.com/graylu21/ELIZA-ChatterBot/blob/master/ELIZAChatterBot.py

We don't want or need the full code. We need a [Minimal, Complete, and Verifiable Example](http://stackoverflow.com/help/mcve) — Bryan Oakley, Dec 02 '16 at 03:20

score 1 · Answer 1 · answered Dec 02 '16 at 03:22

1

Simply add a binding to '<Return>':

self.respond = ttk.Button(self, text='Get Response', command=self.get_response)
self.respond.grid(column=1, row=0, sticky='nesw', padx=3, pady=3)
self.bind('<Return>', self.get_response)

Whenever you press Enter/Return (Tkinter uses the latter because '<Enter>' refers to when the mouse cursor enters a widget) while the self window is active, it will call self.get_response.

answered Dec 02 '16 at 03:22

TigerhawkT3

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Thanks for the help, but I'm getting a type error: get_response() takes 1 positional argument but 2 were given. – Grayson Wiggins Dec 02 '16 at 14:11

score 0 · Answer 2 · edited May 23 '17 at 12:30

Got it to work! Found the solution in a comment at: How to bind the Enter key to a button in Tkinter

Instead of binding the Enter key to the button, I bound it to the Entry window!

    self.usr_input = ttk.Entry(self, state='normal')
    self.usr_input.grid(column=0, row=0, sticky='nesw', padx=3, pady=3)
    self.usr_input.focus() #Sets focus to the input bar at start
    self.usr_input.bind('<Return>', lambda e: self.get_response()) #Binds the Enter key

    self.respond = ttk.Button(self, text='Get Response', command=self.get_response)
    self.respond.grid(column=1, row=0, sticky='nesw', padx=3, pady=3)

Bind 'Enter' on complicated Tkinter code

2 Answers2