Drag widget on run time in python

i want to create an app where in tkinter widgets can be draged. for the purpose I written following code but the problem is while dragging, the mouse pointer value (event.x, event.y) is different from widget.place() x and y value so the mouse pointer is way down but the widget is not moving far enough.

from tkinter import *
import tkinter as tk

window = tk.Tk()
window.geometry('500x500+100+100')
window.title('testing')
global pressed
pressed = FALSE


def drag(event):
    global pressed
    pressed = TRUE


def drop(event):
    global pressed
    pressed = FALSE


def move(event):
    global pressed
    if pressed == TRUE:
        x_pointer, y_pointer = event.x, event.y
        label1.place(x=x_pointer, y=y_pointer)
        print('{}, {}'.format(x_pointer, y_pointer))


label1 = Label(window, text='Drag Me', width=10)
label1.place(x=10, y=10)
label1.bind('<ButtonPress>', drag)
label1.bind('<ButtonRelease>', drop)
label1.bind('<Motion>', move)
window.mainloop()