I cannot edit the text within Tk.text as it keeps saying the function is not defined

I want to be able to have two functions, one function, get_text will allow me to retrieve the text currently in the text module and print it out. The other function set_text, I want to be able to replace the text currently in the tk.text with the input in the set_text function.

#!/usr/bin/python3
import tkinter as tk
import tkinter.ttk as ttk


class GetMethodsTestApp:
    def __init__(self, master=None):
        # build ui
        global text1

        toplevel1 = tk.Tk() if master is None else tk.Toplevel(master)
        toplevel1.configure(height=200, width=200)
        toplevel1.geometry("384x288")
        frame1 = ttk.Frame(toplevel1)
        frame1.configure(height=200, width=200)
        text1 = tk.Text(frame1)
        text1.configure(height=10, width=50)
        _text_ = 'result'
        text1.insert("0.0", _text_)
        text1.pack(side="top")
        frame1.grid(column=0, row=0, sticky="nsew")
        toplevel1.rowconfigure(0, weight=1)
        toplevel1.columnconfigure(0, weight=1)
        # Main widget
        self.mainwindow = toplevel1

    def run(self):
        self.mainwindow.mainloop()


    def get_text():
        msg = text1.get("0.0", len(_text_))
        print(msg)

    print(get_text())
    
    
    def set_text():
        add = input("Enter the text to replace in the string")
        while msg != add:
            add = input("Enter the text to replace in the string")

        
   print(set_text())     
        
if __name__ == "__main__":
    app = GetMethodsTestApp()
    app.run()

I wanted to get the text from the tk.text but it would not let me access it, even when I make it global. I wanted to set the text in the set_text function but it would not let me use the text in the gui.

source https://stackoverflow.com/questions/75794704/i-cannot-edit-the-text-within-tk-text-as-it-keeps-saying-the-function-is-not-def