bpo-38200: Add itertools.pairwise() (GH-23549)

1 files changed, 32 insertions, 1 deletions

diff --git a/Modules/clinic/itertoolsmodule.c.h b/Modules/clinic/itertoolsmodule.c.h
index c1192bb..82729ee 100644
--- a/Modules/clinic/itertoolsmodule.c.h
+++ b/Modules/clinic/itertoolsmodule.c.h
@@ -2,6 +2,37 @@
 preserve
 [clinic start generated code]*/
 
+PyDoc_STRVAR(pairwise_new__doc__,
+"pairwise(iterable, /)\n"
+"--\n"
+"\n"
+"Return an iterator of overlapping pairs taken from the input iterator.\n"
+"\n"
+"    s -> (s0,s1), (s1,s2), (s2, s3), ...");
+
+static PyObject *
+pairwise_new_impl(PyTypeObject *type, PyObject *iterable);
+
+static PyObject *
+pairwise_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
+{
+    PyObject *return_value = NULL;
+    PyObject *iterable;
+
+    if ((type == &pairwise_type) &&
+        !_PyArg_NoKeywords("pairwise", kwargs)) {
+        goto exit;
+    }
+    if (!_PyArg_CheckPositional("pairwise", PyTuple_GET_SIZE(args), 1, 1)) {
+        goto exit;
+    }
+    iterable = PyTuple_GET_ITEM(args, 0);
+    return_value = pairwise_new_impl(type, iterable);
+
+exit:
+    return return_value;
+}
+
 PyDoc_STRVAR(itertools_groupby__doc__,
 "groupby(iterable, key=None)\n"
 "--\n"
@@ -627,4 +658,4 @@ skip_optional_pos:
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=d7f58dc477814b45 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=889c4afc3b13574f input=a9049054013a1b77]*/