tkinter startup tearoff menu

tearoff.py

import tkinter

def tearoff_callback(menu, tearoff):
    """Move the tearoff menu after tearoff"""
    root.update()
    x = root.winfo_x() - 75
    y = root.winfo_y()
    root.tk.call('wm', 'geometry', tearoff, f'+{x}+{y}')

root = tkinter.Tk()
root.geometry('400x400+200+200')
tkinter.Label(root, text='This is in the main window').pack()

# tearoff menu
tearoff_menu = tkinter.Menu(root, tearoff=1, title='File')
tearoff_menu.configure(tearoffcommand=tearoff_callback)
tearoff_menu.add_command(label="New", command=lambda: print("new"))
tearoff_menu.add_command(label="Open", command=lambda: print("open"))
tearoff_menu.add_command(label="Save", command=lambda: print("save"))
tearoff_menu.add_command(label="Save as...", command=lambda: print("save as..."))
tearoff_menu.add_command(label="Close", command=root.quit)

# invoke the tearoff callback @ index 0
tearoff_menu.invoke(0)

root.mainloop()