pandas deciding code to execute based on user input for Tkinter

To give you an exempel of a tkinter window with two entries and a button that uses the entries content in a called function by the button.

import tkinter as tk

def execute():
    lok = list_of_keywords
    lor = list_of_replacew
    add_keywords() #if user uses submit without add to chart before
    for idx,i in enumerate(list_of_keywords):
        print(f'replace {lok[idx]} with {lor[idx]}')
    lok.clear() #clear list of keywords
    lor.clear() #clear list of replacements
    set_default()

def set_default():
    entry_1.delete(0,'end') #clear entry_1
    entry_2.delete(0,'end') #clear entry_2
    entry_1.focus_set() #focus to entry_1

def add_keywords():
    keyword = entry_1.get()
    replace = entry_2.get()
    if not '' in (keyword,replace): 
        list_of_keywords.append(entry_1.get())
        list_of_replacew.append(entry_2.get())
        set_default()
    else:
        print('nothing to add')

list_of_keywords = []
list_of_replacew = []

root = tk.Tk() #window

label_1 = tk.Label(root,text='Keyword to search:') #User hint
entry_1 = tk.Entry(root) # Entry that takes user input
label_2 = tk.Label(root,text='Replace with:') #User hint
entry_2 = tk.Entry(root) # Entry that takes user input
button_1 = tk.Button(root,text='submit',command=execute) #Button to run function
button_2 = tk.Button(root,text='add to chart',command=add_keywords)
##pack widgets onto the window
button_1.pack(side=tk.BOTTOM,fill=tk.X)
button_2.pack(side=tk.BOTTOM,fill=tk.X)
label_1.pack(side=tk.LEFT)
entry_1.pack(side=tk.LEFT)
label_2.pack(side=tk.LEFT)
entry_2.pack(side=tk.LEFT)
##widget bindings
#use the return key to jump to entry_2
entry_1.bind('<Return>',lambda e:entry_2.focus_set())
#use the return key as option to run function
entry_2.bind('<Return>',lambda e:add_keywords())
###
set_default()

root.mainloop()