how to change the font of a label in tkinter

#How to change the font of a label in Tkinter

#Import 
from tkinter import *

#Screen
window = Tk()
window.title("New Window")
window.geometry("300x250")

Label(window, text = "This is my new project in python!", font = ("Bahnschrift", 14)).pack()
#-------------------------------------------------------------------------------------------
#'font' tells python that we are going to do something with the font
#-------------------------------------------------------------------------------------------
#'()' are needed becuase that is just how python works
#-------------------------------------------------------------------------------------------
#'"___"' put your font name in the quotes
#-------------------------------------------------------------------------------------------
#10 put vyour fontsize after adding a comma after the font name
#-------------------------------------------------------------------------------------------

 pythonCopyimport tkinter as tk
import tkinter.font as tkFont
    
app = tk.Tk()

fontStyle = tkFont.Font(family="Lucida Grande", size=20)

labelExample = tk.Label(app, text="20", font=fontStyle)

def increase_label_font():
    fontsize = fontStyle['size']
    labelExample['text'] = fontsize+2
    fontStyle.configure(size=fontsize+2)

def decrease_label_font():
    fontsize = fontStyle['size']
    labelExample['text'] = fontsize-2
    fontStyle.configure(size=fontsize-2)
    
buttonExample1 = tk.Button(app, text="Increase", width=30,
                          command=increase_label_font)
buttonExample2 = tk.Button(app, text="Decrease", width=30,
                          command=decrease_label_font)

buttonExample1.pack(side=tk.LEFT)
buttonExample2.pack(side=tk.LEFT)
labelExample.pack(side=tk.RIGHT)
app.mainloop()

label_name.configure(foreground="blue")

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

def press():
    Instruction.config(text='Button Pressed')