App with 4 Scripts

import re
import os
import tkinter as tk
from tkinter import filedialog as fd
from tkinter import *

class Product:
    def __init__(self,window):
        self.wind = window
        self.wind.title('Scripts App')
        #Creating a Frame Container
        frame = LabelFrame(self.wind, text = '  Please choose a Script  ')
        frame.grid(row = 0, column = 0,columnspan = 3, pady = 50, padx=60)
        #Button1
        tk.Button(frame, text = 'Post Process YML Script', command = self.post_run_script).grid(row = 3, columnspan = 2, sticky = W + E)
        #Button
        tk.Button(frame, text = 'New Script').grid(row = 4, columnspan = 2, sticky = W + E)
        #Button
        tk.Button(frame, text = 'New Script').grid(row = 5, columnspan = 2, sticky = W + E)
        #Button
        tk.Button(frame, text = 'New Script').grid(row = 6, columnspan = 2, sticky = W + E)

    def post_run_script(self):
        window.directory = fd.askdirectory(
            parent=window,
            initialdir=os.getcwd(),
            title="Please find 'Final delivery' folder:",
        )
        directorio_original = window.directory

        for root, dirs, files in os.walk(directorio_original):
            for name in files:
                if name.endswith(".yml"):
                    name = os.path.join(root,name)
                    print(name)
                    with open (name, "r") as myfile:
                        data = myfile.read()
                    #Busqueda de la string en cuestion y reemplazo con la nueva
                    data = re.sub(r"([ \t]*)- ([a-zA-Z]*:)", r"\1-\n \1 \2", data)
                    print (data)
                    # Sobrescribir con datos nuevos
                    with open(name, 'w') as myfile:
                      myfile.write(data)

if __name__== '__main__' :
    window = Tk()
    application = Product(window)
    window.mainloop()