Some of the dependencies are not compatible with python3 #34

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1. k-okada commented on Sep 23, 2020

   

   k-okada

   on Sep 23, 2020

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   Thanks for report, interestingly "StringIO" is not used anyware in this script, so can we remote that line? @jhseeingthings
2. jhseeingthings commented on Sep 23, 2020

   

   jhseeingthings

   on Sep 23, 2020

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   Thank you a lot!
   I have tried your advice. but it still doesn't work.
   Traceback (most recent call last):
   File "/opt/ros/noetic/lib/smach_viewer/smach_viewer.py", line 48, in
   import wxversion
   ModuleNotFoundError: No module named 'wxversion'
   But i couldn't find the appropriate version(2.8) for wxversion, then i installed the python-wxgtk3.0.
   However, it doesn't work out.
   How could i solve this? thank you.
3. hcostelha commented on Oct 17, 2020

   

   hcostelha

   on Oct 17, 2020

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   I have the same problem. Although it has been released into the noetic repository, it seems not to be compatible with with Ubuntu 20.04 with ROS noetic and Python 3.

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4. FilipHesse commented on Oct 22, 2020

   

   FilipHesse

   on Oct 22, 2020

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   Same problem here, porting to python 3 would be appreciated a lot.

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5. jhseeingthings

   changed the title [-]Some of the dependencies are not comaptible with python3[/-] [+]Some of the dependencies are not compatible with python3[/+] on Nov 17, 2020
6. cosmicog commented on Dec 13, 2020

   

   cosmicog

   on Dec 13, 2020

   Last edited by cosmicog

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   I think updating the code according to the newer versions of the xdot and wxpython won't be possible. I downloaded the code and tried for myself but since the owner of this repository kinda wrote his own version of the dependencies, Making it work with Noetic is looking almost impossible to me. Maybe we should write a new visualization tool.

   Or we would just switch to behaviour trees since it's released even for ROS2.
   https://index.ros.org/p/behaviortree_cpp_v3/#noetic
   Or there's a py_trees, which is also as awesome as above:
   https://index.ros.org/p/py_trees_ros/github-splintered-reality-py_trees_ros/#noetic

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7. karl-exwzd commented on Jun 29, 2021

   

   karl-exwzd

   on Jun 29, 2021

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   For reference: I'm using ROS Noetic and SMACH visualization is something I wanted to have to display the current state of my FSM for easy introspection and bling.

   I could not update it to work in Noetic for the same reasons @cosmicog mentionned, however I was able to get it working by using ROS Melodic Docker container, even though the rest of the ROS framework was run in Noetic. I don't foresee anybody updating this repo anytime soon, at least this gives a way to use the visualization in the last iteration of ROS1 without too much effort.

   Some modifications were needed, this was run in a Ubuntu 20.04 machine:

   docker run -it --rm --network host -e DISPLAY=$DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix:rw ros:melodic bash
   apt-get update
   apt-get install -y python-pyqt5 ros-melodic-executive-smach-visualization
   

   Edit file /opt/ros/melodic/lib/python2.7/dist-packages/smach_viewer/xdot/xdot_qt.py line 44:

   from python_qt_binding.QtWidgets import QWidget, QMainWindow
   

   Change to

   from PyQt5.QtWidgets import QWidget, QMainWindow
   

   Comment out line 185 in /opt/ros/melodic/lib/smach_viewer/smach_viewer.py:

   # self._local_data._data = pickle.loads(msg.local_data)
   

   Or the terminal will be full of errors and the viewer will not update the current state (but will display it).

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