Can array_t be allocated for the worst case and then resized?

[guban]

I need to pre-allocate a py::array_t<float> for the worst-case size,
then call a C++ function that writes some elements and returns the number of elements actually written,
and, finally, resize py::array_t<float> to match the number of elements actually written:

py::array_t<float> out;
out.resize({worst_case_num_elements});
auto out_info = out.request(true);
size_t actual_num_elements = my_cpp_function(out_info.ptr);
out.resize({actual_num_elements});
return out;

This seems to work, but I'm not sure whether it happens to work just by coincidence.
Does the above code uses py::array_t<float> correctly?
In particular, is it correct to call out.resize() after out.request()?