Add the rest of the sequence methods

test/test_extension/slots_test.c

@@ -209,20 +209,34 @@ call_funcs(PyObject* _module, PyObject* args) {
 
     if (cls->tp_as_mapping) {
         printf("tp_as_mapping exists\n");
-        if (cls->tp_as_mapping->mp_subscript) {
-            PyObject* rtn = cls->tp_as_mapping->mp_subscript(obj, PyInt_FromLong(1));
+        PyMappingMethods* map = cls->tp_as_mapping;
+
+        if (map->mp_subscript) {
+            PyObject* rtn = map->mp_subscript(obj, PyInt_FromLong(1));
             printf("mp_subscript exists and returned\n");
             Py_DECREF(rtn);
         } else {
             printf("mp_subscript does not exist\n");
         }
+
+        if (map->mp_length) {
+            Py_ssize_t rtn = map->mp_length(obj);
+            printf("mp_length exists and returned %ld\n", rtn);
+        }
     } else {
         printf("tp_as_mapping doesnt exist\n");
     }
 
     if (cls->tp_as_sequence) {
         printf("tp_as_sequence exists\n");
-        if (cls->tp_as_sequence->sq_item) {
+        PySequenceMethods* seq = cls->tp_as_sequence;
+
+        if (seq->sq_length) {
+            Py_ssize_t rtn = seq->sq_length(obj);
+            printf("sq_length exists and returned %ld\n", rtn);
+        }
+
+        if (seq->sq_item) {
             PyObject* rtn = cls->tp_as_sequence->sq_item(obj, 1);
             printf("sq_item exists and returned\n");
             Py_DECREF(rtn);

test/tests/capi_slots.py

-# expected: fail
-# - wip
-
 import slots_test
 
 for i in xrange(3):
@@ -25,6 +22,10 @@ class C(object):
         print "__getitem__", idx
         return idx - 5
 
+    def __len__(self):
+        print "__len__"
+        return 3
+
 slots_test.call_funcs(C())
 
 # Test to make sure that updating an existing class also updates the tp_* slots: