Function _get_part

numpy/core/src/multiarray/getset.c:679–730

* Create a view of a complex array with an equivalent data-type * except it is real instead of complex. */

 * except it is real instead of complex.
 */
static PyArrayObject *
_get_part(PyArrayObject *self, int imag)
{
    int float_type_num;
    PyArray_Descr *type;
    PyArrayObject *ret;
    int offset;

    switch (PyArray_DESCR(self)->type_num) {
        case NPY_CFLOAT:
            float_type_num = NPY_FLOAT;
            break;
        case NPY_CDOUBLE:
            float_type_num = NPY_DOUBLE;
            break;
        case NPY_CLONGDOUBLE:
            float_type_num = NPY_LONGDOUBLE;
            break;
        default:
            PyErr_Format(PyExc_ValueError,
                     "Cannot convert complex type number %d to float",
                     PyArray_DESCR(self)->type_num);
            return NULL;

    }
    type = PyArray_DescrFromType(float_type_num);
    if (type == NULL) {
        return NULL;
    }

    offset = (imag ? type->elsize : 0);

    if (!PyArray_ISNBO(PyArray_DESCR(self)->byteorder)) {
        Py_SETREF(type, PyArray_DescrNew(type));
        if (type == NULL) {
            return NULL;
        }
        type->byteorder = PyArray_DESCR(self)->byteorder;
    }
    ret = (PyArrayObject *)PyArray_NewFromDescrAndBase(
            Py_TYPE(self),
            type,
            PyArray_NDIM(self),
            PyArray_DIMS(self),
            PyArray_STRIDES(self),
            PyArray_BYTES(self) + offset,
            PyArray_FLAGS(self), (PyObject *)self, (PyObject *)self);
    if (ret == NULL) {
        return NULL;
    }
    return ret;
}

/* For Object arrays, we need to get and set the
   real part of each element.