Error when running visualizer on Ubuntu 20.04

[gabrielenava]

I tried to install robot-log-visualizer on my Ubuntu 20.04.5 LTS

I tried:

https://github.com/ami-iit/robot-log-visualizer#-install-from-pip-with-apt-python

https://github.com/ami-iit/robot-log-visualizer#-use-the-appimage

and

mamba install -c robotology robot-log-visualizer

in all cases, I got the following error when running the visualizer:

You can open the visualizer by visiting the following URL:
http://127.0.0.1:7000/static/
Traceback (most recent call last):
  File "/home/gnava/Software/python_projets/MPC/venv/bin/robot-log-visualizer", line 8, in <module>
    sys.exit(main())
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/robot_log_visualizer/__main__.py", line 38, in main
    gui = RobotViewerMainWindow(
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/robot_log_visualizer/ui/gui.py", line 122, in __init__
    self.toolButton_on_click()
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/robot_log_visualizer/ui/gui.py", line 248, in toolButton_on_click
    PlotItem(signal_provider=self.signal_provider, period=self.animation_period)
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/robot_log_visualizer/ui/plot_item.py", line 17, in __init__
    self.canvas = MatplotlibViewerCanvas(
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/robot_log_visualizer/plotter/matplotlib_viewer_canvas.py", line 45, in __init__
    self.vertical_line_anim = animation.FuncAnimation(
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/matplotlib/animation.py", line 1659, in __init__
    super().__init__(fig, **kwargs)
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/matplotlib/animation.py", line 1394, in __init__
    super().__init__(fig, event_source=event_source, *args, **kwargs)
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/matplotlib/animation.py", line 875, in __init__
    self._setup_blit()
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/matplotlib/animation.py", line 1192, in _setup_blit
    self._init_draw()
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/matplotlib/animation.py", line 1723, in _init_draw
    self._drawn_artists = self._init_func()
  File "/home/gnava/Software/python_projets/MPC/venv/lib/python3.8/site-packages/robot_log_visualizer/plotter/matplotlib_viewer_canvas.py", line 124, in init_vertical_line
    return self.vertical_line, *(self.active_paths.values())
AttributeError: 'MatplotlibViewerCanvas' object has no attribute 'active_paths'

which is strange, as the attribute active_paths is defined inside the class and looks indented correctly.

[traversaro]

Can you run apt list --installed, and pip list --verbose and mamba list in all the environment in which you tried? Thanks

[gabrielenava]

Mamba

apt_list_mamba.txt pip_list_mamba.txt mamba_list.txt

Python project environment

apt_list_python.txt pip_list_python.txt

and there in no mamba list in this case

[HosameldinMohamed]

I confirm having the same issue when trying to run the visualizer.

I'm using the installation via robotology-superbuild source compilation and the dependencies are handled by Conda. The OS is Arch Linux. There could be some interference with system libraries but I made sure that Python and PyQt5 packages used are from Conda. I tried both versions 0.2.2 and 0.3.0 and they both produce the same error.

Interestingly. Using the AppImage installation, I got the error while installing version 0.3.0, but not with version 0.2.2, where it seems to be working fine!

Running AppImage v0.3.0

```python ≻ ./robot-log-visualizer-0.3.0-x86_64.AppImage You can open the visualizer by visiting the following URL: http://127.0.0.1:7000/static/ qt.qpa.plugin: Could not find the Qt platform plugin "wayland" in "" Traceback (most recent call last): File "/tmp/.mount_robot-P82xaL/usr/src/robot-log-visualizer.py", line 54, in sys.exit(main()) File "/tmp/.mount_robot-P82xaL/usr/src/robot-log-visualizer.py", line 38, in main gui = RobotViewerMainWindow( File "/tmp/.mount_robot-P82xaL/usr/src/robot_log_visualizer/ui/gui.py", line 122, in __init__ self.toolButton_on_click() File "/tmp/.mount_robot-P82xaL/usr/src/robot_log_visualizer/ui/gui.py", line 248, in toolButton_on_click PlotItem(signal_provider=self.signal_provider, period=self.animation_period) File "/tmp/.mount_robot-P82xaL/usr/src/robot_log_visualizer/ui/plot_item.py", line 17, in __init__ self.canvas = MatplotlibViewerCanvas( File "/tmp/.mount_robot-P82xaL/usr/src/robot_log_visualizer/plotter/matplotlib_viewer_canvas.py", line 45, in __init__ self.vertical_line_anim = animation.FuncAnimation( File "/tmp/.mount_robot-P82xaL/usr/lib/python3.8/site-packages/matplotlib/animation.py", line 1659, in __init__ super().__init__(fig, **kwargs) File "/tmp/.mount_robot-P82xaL/usr/lib/python3.8/site-packages/matplotlib/animation.py", line 1394, in __init__ super().__init__(fig, event_source=event_source, *args, **kwargs) File "/tmp/.mount_robot-P82xaL/usr/lib/python3.8/site-packages/matplotlib/animation.py", line 875, in __init__ self._setup_blit() File "/tmp/.mount_robot-P82xaL/usr/lib/python3.8/site-packages/matplotlib/animation.py", line 1192, in _setup_blit self._init_draw() File "/tmp/.mount_robot-P82xaL/usr/lib/python3.8/site-packages/matplotlib/animation.py", line 1723, in _init_draw self._drawn_artists = self._init_func() File "/tmp/.mount_robot-P82xaL/usr/src/robot_log_visualizer/plotter/matplotlib_viewer_canvas.py", line 124, in init_vertical_line return self.vertical_line, *(self.active_paths.values()) AttributeError: 'MatplotlibViewerCanvas' object has no attribute 'active_paths' ```

[traversaro]

I am not sure what is happening, but can you try to move the line self.active_paths = {} from https://github.com/ami-iit/robot-log-visualizer/blob/82aa5ba1c92599672365b5393d520a049e28a3ac/robot_log_visualizer/plotter/matplotlib_viewer_canvas.py#L54 before the block:

        self.vertical_line_anim = animation.FuncAnimation(
            self.fig,
            self.update_vertical_line,
            init_func=self.init_vertical_line,
            interval=self.periond_in_ms,
            blit=True,
        )

?

[HosameldinMohamed]

I am not sure what is happening, but can you try to move the line self.active_paths = {}

I moved the line and re-installed the app, and it works with no error..

I can't see the robot's visualizer though, I can only see it from the browser if I use the provided URL. I don't think it's related to this modification though.

[gabrielenava]

this suggestion worked for me, now I can open the visualizer!

I can't see the robot's visualizer though, I can only see it from the browser if I use the provided URL. I don't think it's related to this modification though.

I don't have this issue, the visualizer opens normally on my pc!

[traversaro]

Can anyone open the PR with the fix? Thanks!

[gabrielenava]

PR opened: https://github.com/ami-iit/robot-log-visualizer/pull/49