np.array type returned from np.frombuffer throws incompatible function argument exception

[traplordpanda]

example.

#include <cstdio>
#include <nanobind/nanobind.h>
#include <nanobind/ndarray.h>

NB_MODULE(py_ext, m) {
    m.def("inspect", [](nb::ndarray<> a) {
    printf("Array data pointer : %p\n", a.data());});
}

import py_ext
import numpy as np
data = b'abc'
data2 = np.frombuffer(data, dtype=np.uint8) #, dtype=np.int8)
py_ext.inspect(data2)

Traceback (most recent call last):
  File "/home/kyle/code/md5bind/test.py", line 5, in <module>
    py_ext.inspect(data2)
TypeError: inspect(): incompatible function arguments. The following argument types are supported:
    1. inspect(arg: ndarray[], /) -> None

Invoked with types: ndarray

[wjakob]

Can you give your nb::ndarray a nb::ro attribute? By default, nanobind wants to make an array with read/write access.

[traplordpanda]

That fixed the issue, thank you.