Merge branch 'ynd_sparse' of https://github.com/dwf/Theano into sparse

theano/gof/python25.py

@@ -91,5 +91,17 @@ if sys.version_info[:2] < (2,6):
             for j in range(i+1, r):
                 indices[j] = indices[j-1] + 1
             yield tuple(pool[i] for i in indices)
+
+
+    def product(*args, **kwds):
+        # product('ABCD', 'xy') --> Ax Ay Bx By Cx Cy Dx Dy
+        # product(range(2), repeat=3) --> 000 001 010 011 100 101 110 111
+        pools = map(tuple, args) * kwds.get('repeat', 1)
+        result = [[]]
+        for pool in pools:
+            result = [x+[y] for x in result for y in pool]
+        for prod in result:
+            yield tuple(prod)
+
 else:
-    from itertools import combinations
+    from itertools import combinations, product