Why doesn't the script send code directly to the application?

Question

Python

There is a script that, as planned, should send text input to the notepad, but this does not happen (Individually, everything is done, but the injection does not occur)

import pymem
import subprocess
from time import sleep

try:
    mem = pymem.Pymem('notepad.exe')
except:
    subprocess.Popen('notepad.exe')
    mem = pymem.Pymem('notepad.exe')

mem.inject_python_interpreter()
sleep(1)
code = """
from pywinauto import keyboard

keyboard.send_keys("{VK_SHIFT down}"
          "pywinauto"
          "{VK_SHIFT up}")
"""

mem.inject_python_shellcode(code)