PyUntypedArrayMethods::as_array_ptr doesn’t describe under which circumstances the returned pointer is convertible into a reference.

Since the requirements are rather hairy, it would be great to have a way to access the data safely without going through unsafe. Would it e.g. be possible to have this?

trait PyUntypedArrayMethods<'py> { ... fn bytes<'a>(&'a self) -> &'a [u8] { let ptr = self.as_array_ptr(); let n_bytes = self.len() * self.dtype().itemsize(); unsafe { let p = (*ptr).data.cast(); slice::from_raw_parts(p, n_bytes) } } }

Because we currently implement this ourselves, but without any of the aforementioned safety information, we can’t really be sure if it’s safe.