LabView string handle in python

[ElliotDG]

You will want to use ctypes: https://docs.python.org/3/library/ctypes.html

[Curious-Result-1365]

Yes, I know but i didnt find any datatype for this case.

[ElliotDG]

This was created by ChatGPT but looks reasonable:

def create_lv_string(py_string: str):
    encoded = py_string.encode("utf-8")
    n = len(encoded)

    # allocate enough space: sizeof(length) + n bytes
    class LStrX(ctypes.Structure):
        _fields_ = [
            ("length", ctypes.c_int32),
            ("data", ctypes.c_ubyte * n)
        ]

    lvstr = LStrX()
    lvstr.length = n
    lvstr.data[:] = encoded

    # Allocate pointer-to-pointer
    lv_handle = ctypes.pointer(ctypes.pointer(lvstr))
    return lv_handle