I marked bpo-5885 as a duplicate of this issue, even if it's not exactly the same. The main purpose of this issue was to use uuid_generate_time() using a C extension, as bpo-20519.

+static PyObject *
+uuid_uuid1(PyObject *self, PyObject *args)
+{
+        uuid_t out;
+        uuid_generate_time(out);
+        return PyByteArray_FromStringAndSize((const char *) out,sizeof(out));
+}

+static PyObject *
+uuid_uuid4(PyObject *self, PyObject *args)
+{
+        uuid_t out;
+        uuid_generate_random(out);
+        return PyByteArray_FromStringAndSize(out,sizeof(out));
+}