tkinter- adding a new window after clicking a button built on the gui

[Yoriz]

The second code does what you want with the following changes
fix the import by removing the capitol t and don't use * import
remove the () from command = self.OnButtonClick()

import tkinter as tk
 
class Window(tk.Tk):
    def __init__(self, parent):
        tk.Tk.__init__(self, parent)
        self.parent = parent
        self.initialize()
 
    def initialize(self):
        self.geometry("600x400+30+30")
        wButton = tk.Button(self, text='text', command = self.OnButtonClick)
        wButton.pack()
 
    def OnButtonClick(self):
        top = tk.Toplevel()
        top.title("title")
        top.geometry("300x150+30+30")
        topButton = tk.Button(top, text="CLOSE", command = top.destroy)
        topButton.pack()
 
 
if __name__ == "__main__":
    window = Window(None)
 
    window.title("title")
 
    window.mainloop()