python tkinter change font of whole window code example

Example 1: add font to the label in window tkinter

import tkinter

window = tkinter.Tk()       # creating the window object
window.title('my first GUI program')
window.minsize(width=600, height=500)

# label 
# adding text to the middle of the window
my_label = tkinter.Label(text='I am a Label', font=('Cursive', 24, 'bold'))
my_label.pack()

window.mainloop()           # keeping the window until we close it

Example 2: how to change font in tkinter

import tkinter.font as font

#create Font object
myFont = font.Font(family='Helvetica')

button = Button(parent, font=myFont)
#or
button = Button(parent)
button['font'] = myFont