From 1b791158af6abbc44860a99edc09c6a606b77388 Mon Sep 17 00:00:00 2001
From: "kr.angelov" <kr.angelov@gmail.com>
Date: Fri, 31 May 2013 09:24:15 +0000
Subject: [PATCH] now the call Expr.unpack("? e1 e2") in Python returns a pair
 with None as the first element and a the list [e1,e2] as the second. This
 makes it easier to decompose partial abstract trees

---
 src/runtime/python/pypgf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/runtime/python/pypgf.c b/src/runtime/python/pypgf.c
index e1e360dce..698b48ec9 100644
--- a/src/runtime/python/pypgf.c
+++ b/src/runtime/python/pypgf.c
@@ -343,8 +343,9 @@ Expr_unpack(ExprObject* self, PyObject *fargs)
 			}
 		}
 		case PGF_EXPR_META: {
+			PyObject* res = Py_BuildValue("OO", Py_None, args);
 			Py_DECREF(args);
-			return Py_None;
+			return res;
 		}
 		case PGF_EXPR_FUN: {
 			PgfExprFun* efun = i.data;