# Tk_replace_label_text.py

# Tk_replace_label_text.py

from tkinter import *

root = Tk()
root.title('Tk_replace_label_text')

canvas = Canvas(root, width=400, height=100)
canvas.pack()

sample_list = 'this is a sample list of words for the pop up menu'.split()

hypertext_word = 'click this text to open the menu'

menu = Menu(root, tearoff=0)
for word in sample_list:
    menu.add_command(label=word)

text_label = Label(root, text='')
text_label.place(x=0, y=10, width=400)

def show_menu(event):
    menu.post(text_label.winfo_rootx()+300, int(menu.winfo_height()))

def target_text(selected):
    global text_2_change
    text_2_change = Label(text_label, text=selected, fg='blue', cursor='hand2')
    text_2_change.place(x=10)
    text_2_change.bind('<Button-1>', show_menu)

target_text(hypertext_word)

def menucallback(event): # hacked solution
    index = root.call(event.widget, "index","active")
    selected = menu.entrycget(index, 'label')
    if selected:
        try:
            text_2_change.destroy()
        except:
            0
        target_text(selected)


text_label.bind('<Button-1>', show_menu)
menu.bind('<<MenuSelect>>', menucallback)

root.mainloop()