the number of deltas/patches in one diff

src/diff.c

@@ -249,6 +249,12 @@ PyTypeObject DiffIterType = {
     (iternextfunc) DiffIter_iternext,          /* tp_iternext       */
 };
 
+PyDoc_STRVAR(Diff_size__doc__, "Returns the number of deltas/patches in this diff.");
+PyObject *
+Diff_size__get__(Diff *self)
+{
+    return PyLong_FromSize_t(git_diff_num_deltas(self->list));
+}
 
 PyDoc_STRVAR(Diff_patch__doc__, "Patch diff string.");
 
@@ -440,6 +446,7 @@ Diff_dealloc(Diff *self)
 
 PyGetSetDef Diff_getseters[] = {
     GETTER(Diff, patch),
+    GETTER(Diff, size),
     {NULL}
 };
 

test/test_diff.py

@@ -254,6 +254,7 @@ class DiffTest(utils.BareRepoTestCase):
 
         diff = commit_a.tree.diff_to_tree(commit_b.tree)
         self.assertEqual(diff.patch, PATCH)
+        self.assertEqual(diff.size, len([patch for patch in diff]))
 
     def test_diff_oids(self):
         commit_a = self.repo[COMMIT_SHA1_1]