我有一个带有以下签名的go库：

//export getData
func getData(symbol string, day int, month string, year int) string {
    return "getData2"
}

在Python中，我喜欢下面的代码：

import ctypes
library = ctypes.cdll.LoadLibrary('./lib.so')
get_data = library.getData

# Make python convert its values to C representation.
get_data.argtypes = [ctypes.c_char_p, ctypes.c_int,ctypes.c_int,ctypes.c_int]
get_data.restype = ctypes.c_wchar

# j= get_data("BTC".encode('utf-8'), "3", "JAN".encode('utf-8'), "23".encode('utf-8'))
j= get_data(b"XYZ", 3, "JAN", 23)
print(j)

它给出了误差

ctypes.ArgumentError: argument 3: <class 'TypeError'>: wrong type

我使用的是Python 3.9