Tkinter_plus_Button

from tkinter import *
#####################################
def center(win):
    """
    centers a tkinter window
    :param win: the main window or Toplevel window to center
    """
    win.update_idletasks()
    width = win.winfo_width()
    frm_width = win.winfo_rootx() - win.winfo_x()
    win_width = width + 2 * frm_width
    height = win.winfo_height()
    titlebar_height = win.winfo_rooty() - win.winfo_y()
    win_height = height + titlebar_height + frm_width
    x = win.winfo_screenwidth() // 2 - win_width // 2
    y = win.winfo_screenheight() // 2 - win_height // 2
    win.geometry('{}x{}+{}+{}'.format(width, height, x, y))
    win.deiconify()
######################################
root = Tk()
root.title('Пример кнопки')
root.geometry('500x500')
root.configure(background='green')
center(root)
#img = PhotoImage(file='gas-kvas-com-p-robot-belii-na-prozrachnom-fone-6.png')
but_1 = Button(text='Нажми!', width=20,
               #image=img,
               height=2, font=('Arial','20'),
               bg='cyan', fg='red', bd='10')
but_1.place(x=83,y=320)
#########################
root.mainloop()