adapt reduce() to Py2/Py3 changes

Cython/Compiler/PyrexTypes.py

@@ -7,6 +7,11 @@ from __future__ import absolute_import
 import copy
 import re
 
+try:
+    reduce
+except NameError:
+    from functools import reduce
+
 from .Code import UtilityCode, LazyUtilityCode, TempitaUtilityCode
 from . import StringEncoding
 from . import Naming

Cython/Compiler/TypeInference.py

@@ -9,6 +9,11 @@ from .. import Utils
 from .PyrexTypes import py_object_type, unspecified_type
 from .Visitor import CythonTransform, EnvTransform
 
+try:
+    reduce
+except NameError:
+    from functools import reduce
+
 
 class TypedExprNode(ExprNodes.ExprNode):
     # Used for declaring assignments of a specified type without a known entry.