update approximate time filter to work with python2 and python3 (#1660)

ros · Mar 15, 2019 · 627b5af · 627b5af
1 parent 87eba68
commit 627b5af
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/utilities/message_filters/src/message_filters/__init__.py b/utilities/message_filters/src/message_filters/__init__.py
@@ -290,7 +290,7 @@ def add(self, msg, my_queue, my_queue_index=None):
                 return
             topic_stamps = sorted(topic_stamps, key=lambda x: x[1])
             stamps.append(topic_stamps)
-        for vv in itertools.product(*[zip(*s)[0] for s in stamps]):
+        for vv in itertools.product(*[next(iter(zip(*s))) for s in stamps]):
             vv = list(vv)
             # insert the new message
             if my_queue_index is not None: