Python3 Compatibility Variable Type long

[tommy3001]

There is an issue in
rqt_bag/plugins/raw_view.py
and
rqt_bag_plugins/plot_view.py
regarding PEP 0237.
Python 3 handles long data types as an int, long is therefore not available:

Traceback (most recent call last): File "/opt/ros/melodic/lib/python3.7/site-packages/rqt_bag/plugins/message_view.py", line 92, in event self.message_viewed(bag, msg_data) File "/opt/ros/melodic/lib/python3.7/site-packages/rqt_bag/plugins/raw_view.py", line 65, in message_viewed self.message_tree.set_message(msg) File "/opt/ros/melodic/lib/python3.7/site-packages/rqt_bag/plugins/raw_view.py", line 103, in set_message self._add_msg_object(None, '', '', msg, msg._type) File "/opt/ros/melodic/lib/python3.7/site-packages/rqt_bag/plugins/raw_view.py", line 186, in _add_msg_object if type(obj) in [int, long, float]: NameError: name 'long' is not defined

[tommy3001]

I deleted long from the list in the regarding files. For me it is working now....

[dirk-thomas]

Please consider to provide a pull request for this which works with both Python versions. The same issue has been address in other packages, e.g.: https://github.com/ros/ros_comm/blob/fe9479cdbf0be0caa542c74c7c1fb8229ea8164d/tools/rostopic/src/rostopic/__init__.py#L67-L70

[oceanusxiv]

@dirk-thomas #51 only fixes one file with this issue I believe, this issue still persists in raw_view.py. I'll see if I can get another PR to fix that, but in the meantime we might want to keep this open.