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

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Mar 15, 2019
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update approximate time filter to work with python2 and python3 #1660

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2 changes: 1 addition & 1 deletion utilities/message_filters/src/message_filters/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -289,7 +289,7 @@ 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:
Expand Down