meaning of the parameters of the root.tk.call() method

Could someone explain to me the meaning of the parameters of this root.tk.call() method?

this method is for to define the tkinter application icon. As I recently changed from windows to linux I’m having this difficulty , because in windows it was a very simple method.

code:

import tkinter as tk

root=tk.Tk()

root.geometry("600x400+400+200")

root.title('MInha aplicação GUI')

**root.tk.call('wm', 'iconphoto', root._w, tk.PhotoImage(file='images_gallery_21525.png'))**

root.mainloop()

>Solution :

The canonical documentation can be found in the man page of the wm iconphoto command.

• wm is the name of the command being run.
• iconphoto is the name of the subcommand of the wm command.
• root._w, is the internal name for the widget that should use the image.
• tk.PhotoImage(...) creates a PhotoImage which will appear on the window.