how to access a window and then press key on it with python\ code example

Example 1: how to simulate a key press in python

# in command prompt, type "pip install pynput" to install pynput.
from pynput.keyboard import Key, Controller

keyboard = Controller()
key = "a"

keyboard.press(key)
keyboard.release(key)

Example 2: python check if key is pressed

import keyboard

# Check if b was pressed
if keyboard.is_pressed('b'):
	print('b Key was pressed')