1 files changed, 26 insertions, 0 deletions
diff --git a/docs/examples/userguide/memoryviews/custom_dtype.pyx b/docs/examples/userguide/memoryviews/custom_dtype.pyx
new file mode 100644
index 000000000..d54d7bbc4
--- /dev/null
+++ b/docs/examples/userguide/memoryviews/custom_dtype.pyx
@@ -0,0 +1,26 @@
+import numpy as np
+
+CUSTOM_DTYPE = np.dtype([
+    ('x', np.uint8),
+    ('y', np.float32),
+])
+
+a = np.zeros(100, dtype=CUSTOM_DTYPE)
+
+cdef packed struct custom_dtype_struct:
+    # The struct needs to be packed since by default numpy dtypes aren't
+    # aligned
+    unsigned char x
+    float y
+
+def sum(custom_dtype_struct [:] a):
+
+    cdef:
+        unsigned char sum_x = 0
+        float sum_y = 0.
+
+    for i in range(a.shape[0]):
+        sum_x += a[i].x
+        sum_y += a[i].y
+
+    return sum_x, sum_y