I’m trying to learn some basic ttkbootstrap/tkinter in Python, and I’ve got a small scenario I can’t seem to understand and work around.

I have the following “Demo” code below, which is loosely pieced together with some samples I found online.

import ttkbootstrap as tb

from tkinter import *
from ttkbootstrap.constants import *

class MyApp(tb.Frame):

    global appname, appver
    appname = "Test App"
    appver = "0.1B"

    def __init__(self, master):
        super().__init__(master)
        self.pack(fill=BOTH, expand=YES, padx=20, pady=20)

        # Variables
        self.TextBox1_var = tb.StringVar(value='')

        # Label Frame builder
        option_text = "Test"
        self.option_lf = tb.Labelframe(self, text=option_text, padding=5)
        self.option_lf.pack(fill=X, expand=YES, anchor=N)

        # Build the form
        self.TextBox1_Row()
        self.Button1_Row()

    def TextBox1_Row(self):
        """Add row to labelframe"""
        TextBox1_row = tb.Frame(self.option_lf)
        TextBox1_row.pack(fill=X, expand=YES, pady=5)
        TextBox1_lbl = tb.Label(TextBox1_row, text="Input:", width=12)
        TextBox1_lbl.pack(side=LEFT, padx=(15, 0))
        TextBox1_ent = tb.Entry(TextBox1_row, textvariable=self.TextBox1_var)
        TextBox1_ent.pack(side=LEFT, fill=X, expand=YES, padx=5)
        self.TextBox1_var.trace_add("write", lambda name, index, mode, sv=self.TextBox1_var: MonitorTextChanges.TextBox1_callback(self.TextBox1_var))

    def Button1_Row(self):
        """Add row to labelframe"""
        Button1_Row = tb.Frame(self.option_lf)
        Button1_Row.pack(fill=X, expand=YES, pady=5)
        Button1_Go = tb.Button(
            master=Button1_Row, 
            text="Go", 
            width=15,
            state=DISABLED
        )
        Button1_Go.pack(side=RIGHT, padx=5)

class MonitorTextChanges():
    def TextBox1_callback(TextBox1_var):

        if len(TextBox1_var.get()) != 0:
            print(TextBox1_var.get())
            #MyApp.Button1_Row.Button1_Go.config(state="normal")
        else:
            print("Please enter some text!")
            #MyApp.Button1_Row.Button1_Go.config(state="disabled")

def main():
    app = tb.Window(
        title=appname + " - " + appver,
        themename="superhero",
        minsize=(300,150),
        resizable=(True, True),
        scaling=2
    )
    MyApp(app)
    MonitorTextChanges()
    app.mainloop()

if __name__ == '__main__':
    main()

I’m attempting to update the state of the button whenever there is present text, and to disable it whenever the text field is empty from between classes, but I cannot seem to figure out how to target the button in the MyApp class.

I’ve tried the fllowing:

MyApp.Button1_Go.config(state="normal")
which yields
AttributeError: type object 'MyApp' has no attribute 'Button1_Go'. Did you mean: 'Button1_Row'?

MyApp.Button1_Row.config(state="normal")
which yields
AttributeError: 'function' object has no attribute 'config'

MyApp.Button1_Row.Button1_Go.config(state="normal")
which yields
AttributeError: 'function' object has no attribute 'Button1_Go'

So, I’m not sure how to actually target this button in the MyApp class to change the state of it.