add ndim property (#725)

code/ndarray.c

@@ -1398,6 +1398,13 @@ mp_obj_t ndarray_itemsize(mp_obj_t self_in) {
 }
 #endif
 
+#if NDARRAY_HAS_NDIM
+mp_obj_t ndarray_ndim(mp_obj_t self_in) {
+    ndarray_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    return MP_OBJ_NEW_SMALL_INT(self->ndim);
+}
+#endif
+
 #if NDARRAY_HAS_SHAPE
 mp_obj_t ndarray_shape(mp_obj_t self_in) {
     ndarray_obj_t *self = MP_OBJ_TO_PTR(self_in);

code/ndarray.h

@@ -232,6 +232,10 @@ mp_obj_t ndarray_dtype(mp_obj_t );
 mp_obj_t ndarray_itemsize(mp_obj_t );
 #endif
 
+#if NDARRAY_HAS_NDIM
+mp_obj_t ndarray_ndim(mp_obj_t );
+#endif
+
 #if NDARRAY_HAS_SIZE
 mp_obj_t ndarray_size(mp_obj_t );
 #endif

code/ndarray_properties.c

@@ -6,7 +6,7 @@
  *
  * The MIT License (MIT)
  *
- * Copyright (c) 2021 Zoltán Vörös
+ * Copyright (c) 2021-2025 Zoltán Vörös
  *
 */
 
@@ -42,6 +42,11 @@ void ndarray_properties_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
                 dest[0] = ndarray_itemsize(self_in);
                 break;
             #endif
+            #if NDARRAY_HAS_NDIM
+            case MP_QSTR_ndim:
+                dest[0] = ndarray_ndim(self_in);
+                break;
+            #endif
             #if NDARRAY_HAS_SHAPE
             case MP_QSTR_shape:
                 dest[0] = ndarray_shape(self_in);

code/ndarray_properties.h

@@ -7,7 +7,7 @@
  * The MIT License (MIT)
  *
  * Copyright (c) 2020 Jeff Epler for Adafruit Industries
- *               2020-2021 Zoltán Vörös
+ *               2020-2025 Zoltán Vörös
 */
 
 #ifndef _NDARRAY_PROPERTIES_
@@ -36,6 +36,10 @@ MP_DEFINE_CONST_FUN_OBJ_1(ndarray_flatiter_make_new_obj, ndarray_flatiter_make_n
 MP_DEFINE_CONST_FUN_OBJ_1(ndarray_itemsize_obj, ndarray_itemsize);
 #endif
 
+#if NDARRAY_HAS_NDIM
+MP_DEFINE_CONST_FUN_OBJ_1(ndarray_ndim_obj, ndarray_ndim);
+#endif
+
 #if NDARRAY_HAS_SHAPE
 MP_DEFINE_CONST_FUN_OBJ_1(ndarray_shape_obj, ndarray_shape);
 #endif

code/ulab.c

@@ -33,7 +33,7 @@
 #include "user/user.h"
 #include "utils/utils.h"
 
-#define ULAB_VERSION 6.7.7
+#define ULAB_VERSION 6.8.0
 #define xstr(s) str(s)
 #define str(s) #s
 

code/ulab.h

@@ -245,6 +245,10 @@
 #define NDARRAY_HAS_ITEMSIZE            (1)
 #endif
 
+#ifndef NDARRAY_HAS_NDIM
+#define NDARRAY_HAS_NDIM                (1)
+#endif
+
 #ifndef NDARRAY_HAS_RESHAPE
 #define NDARRAY_HAS_RESHAPE             (1)
 #endif