Function ensure

include/pybind11/numpy.h:1495–1501

Ensure that the argument is a NumPy array of the correct dtype (and if not, try to convert it). In case of an error, nullptr is returned and the Python error is cleared.

    /// Ensure that the argument is a NumPy array of the correct dtype (and if not, try to convert
    /// it).  In case of an error, nullptr is returned and the Python error is cleared.
    static array_t ensure(handle h) {
        auto result = reinterpret_steal<array_t>(raw_array_t(h.ptr()));
        if (!result) {
            PyErr_Clear();
        }
        return result;
    }

    static bool check_(handle h) {
        const auto &api = detail::npy_api::get();