how to wait user type finish in entry widget from tkinter only execute bind function

Question

I try search in stack overflow but I cant get the answer I need. Below is the code:

from tkinter import *

root = Tk()

text = StringVar()
entry = Entry(root, textvariable=text)
entry.grid(row=0, column=0)

def show(*args):
    print(text.get())

text.trace_add("write", show)

root.mainloop()

I am looking for user to type finish in the entry widget and only auto trigger the show functions. Instead of this output:

i am looking for this output:

Please help.

Edit: My show function contains below code:

Answer 1

You can use .after() to execute show() in the callback of trace_add() as below:

from tkinter import *

root = Tk()

text = StringVar()
entry = Entry(root, textvariable=text)
entry.grid(row=0, column=0)

scheduler = None

def show():
    print(text.get())

def on_change(*args):
    global scheduler
    # cancel scheduler upon content change
    if scheduler:
        entry.after_cancel(scheduler)
    # create new scheduler to execute show one second later
    # change 1000 (ms) to whatever value you want
    scheduler = entry.after(1000, show)

text.trace_add('write', on_change)

root.mainloop()