Нажатие клавиш

import ctypes
 
DWORD = ctypes.c_ulong
ULONG_PTR = ctypes.POINTER(DWORD)
WORD = ctypes.c_ushort
 
INPUT_KEYBOARD = 1
KEYEVENTF_KEYUP = 0x0002
KEYEVENTF_UNICODE = 0x0004
 
class KEYBDINPUT(ctypes.Structure):
    _fields_ = (
        ('wVk', WORD),
        ('wScan', WORD),
        ('dwFlags', DWORD),
        ('time', DWORD),
        ('dwExtraInfo', ULONG_PTR))
 
class _INPUTunion(ctypes.Union):
    _fields_ = (('ki', KEYBDINPUT),)
 
class INPUT(ctypes.Structure):
    _fields_ = (
        ('type', DWORD),
        ('union', _INPUTunion))
 
def send_input(*inputs):
    nInputs = len(inputs)
    LPINPUT = INPUT * nInputs
    pInputs = LPINPUT(*inputs)
    cbSize = ctypes.c_int(ctypes.sizeof(INPUT))
    return ctypes.windll.user32.SendInput(nInputs, pInputs, cbSize)
 
def input_structure(structure):
    return INPUT(INPUT_KEYBOARD, _INPUTunion(ki=structure))
 
def keyboard_input(code, flags):
    return KEYBDINPUT(0, code, flags, 0, None)
 
def keyboard_event(code, flags=KEYEVENTF_UNICODE):
    return input_structure(keyboard_input(code, flags))
 
def press(character):
    code = ord(character)
    send_input(keyboard_event(code))
    send_input(keyboard_event(code, KEYEVENTF_KEYUP))
 
def main():
    press('a')
 
if __name__ == '__main__':
    main()