如何使用ctype将SendInput函数包装成python

import ctypes

# 定义SendInput函数的参数类型
UINT = ctypes.c_uint
LPINPUT = ctypes.POINTER(INPUT)
SendInput = ctypes.windll.user32.SendInput
SendInput.argtypes = [UINT, LPINPUT, ctypes.c_int]
SendInput.restype = UINT

class INPUT(ctypes.Structure):
    class _INPUT(ctypes.Union):
        _fields_ = [("ki", KEYBDINPUT),
                    ("mi", MOUSEINPUT),
                    ("hi", HARDWAREINPUT)]

    _anonymous_ = ("_input",)
    _fields_ = [("type", ctypes.c_ulong),
                ("_input", _INPUT)]

def create_key_event(virtual_key):
    # 定义输入事件类型为键盘事件
    INPUT_KEYBOARD = 1

    # 定义键盘输入事件的结构体
    class KEYBDINPUT(ctypes.Structure):
        _fields_ = [("wVk", ctypes.c_ushort),
                    ("wScan", ctypes.c_ushort),
                    ("dwFlags", ctypes.c_ulong),
                    ("time", ctypes.c_ulong),
                    ("dwExtraInfo", ctypes.POINTER(ctypes.c_ulong))]

    # 定义键盘输入事件的标志位
    KEYEVENTF_KEYUP = 0x0002

    # 创建键盘输入事件
    input_event = INPUT()
    input_event.type = INPUT_KEYBOARD
    input_event._input.ki = KEYBDINPUT(virtual_key, 0, 0, 0, None)

    return input_event

def send_key_event(virtual_key):
    # 创建键盘输入事件
    input_event = create_key_event(virtual_key)

    # 调用SendInput函数发送输入事件
    SendInput(1, ctypes.byref(input_event), ctypes.sizeof(INPUT))

# 发送键盘输入事件，模拟按下A键
send_key_event(0x41)