tk.entry callback code example

Example 1: calling a function in python upon entry content changing tkinter

from tkinter import *

root = Tk()
sv = StringVar()

def callback():
    print(sv.get())
    return True

e = Entry(root, textvariable=sv, validate="focusout", validatecommand=callback)
e.grid()
e = Entry(root)
e.grid()
root.mainloop()

Example 2: calling a function in python upon entry content changing tkinter

sv.trace_add("write", callback)

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Python Example

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