From a8dfe613b3ade337e1c6dc87694c357ec9be2e13 Mon Sep 17 00:00:00 2001
From: Laurent Perron <lperron@google.com>
Date: Fri, 12 Mar 2021 13:34:41 +0100
Subject: [PATCH] fix for python 3.8

---
 ortools/util/python/functions.i | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ortools/util/python/functions.i b/ortools/util/python/functions.i
index 47807d6278..1864ffaea2 100644
--- a/ortools/util/python/functions.i
+++ b/ortools/util/python/functions.i
@@ -218,7 +218,7 @@ static ReturnT InvokePythonCallableReturning(PyObject* pyfunc) {
     PyObject* py_str = PyUnicode_FromStringAndSize(str.c_str(), str.size());
     PyObject* result;
     SWIG_PYTHON_THREAD_BEGIN_BLOCK;
-    result = PyObject_CallOneArg(input.get(), py_str);
+    result = PyObject_CallFunction(input.get(), "O", py_str);
     SWIG_PYTHON_THREAD_END_BLOCK;
     Py_DECREF(py_str);
     return result;