standalone.py

[paulaurel]

When running the standalone.py script I get an error message, related to env = gym.make(args.env_name).

[maximecb]

Please paste the complete error message you got.

[paulaurel]

This is the error I received: Traceback (most recent call last): File "./standalone.py", line 18, in env = gym.make(args.env_name) File "/home/daurel/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 163, in make return registry.make(id) File "/home/daurel/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 119, in make env = spec.make() File "/home/daurel/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 86, in make env = cls(**self._kwargs) File "/home/daurel/Documents/Bachelorarbeit/DuckieSim/gym-duckietown/gym_duckietown/envs/simplesim_env.py", line 281, in init self.multiFBO, self.finalFBO = createFrameBuffers() File "/home/daurel/Documents/Bachelorarbeit/DuckieSim/gym-duckietown/gym_duckietown/envs/simplesim_env.py", line 97, in createFrameBuffers True File "/home/daurel/.local/lib/python3.5/site-packages/pyglet/gl/lib.py", line 105, in errcheck raise GLException(msg) pyglet.gl.lib.GLException: b'invalid operation'

[maximecb]

Are you on a mac?

[paulaurel]

using a virtual machine on a mac

[maximecb]

So the issue is because the OpenGL drivers on the mac don't support some of the features that I'm using (supported by nvidia drivers). Specifically the use of anti-aliasing in frame buffer objects. I'll try to make it work. I have a macbook at home that I can use to test it.

[paulaurel]

That would be perfect thank you.

[paulaurel]

I just ran the standalone.py code on a pc running linux and encountered the following problem

./standalone.py Traceback (most recent call last): File "./standalone.py", line 18, in env = gym.make(args.env_name) File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 163, in make return registry.make(id) File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 119, in make env = spec.make() File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 85, in make cls = load(self._entry_point) File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 14, in load result = entry_point.load(False) File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/pkg_resources/init.py", line 2431, in load return self.resolve() File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/pkg_resources/init.py", line 2437, in resolve module = import(self.module_name, fromlist=['name'], level=0) File "/home/daurel_duckietown/Documents/Bachelorarbeit/duckiesim/gym-duckietown/gym_duckietown/envs/init.py", line 3, in from gym_duckietown.envs.duckiebot_env import DuckiebotEnv File "/home/daurel_duckietown/Documents/Bachelorarbeit/duckiesim/gym-duckietown/gym_duckietown/envs/duckiebot_env.py", line 10, in import cv2 ImportError: /opt/ros/kinetic/lib/python2.7/dist-packages/cv2.so: undefined symbol: PyCObject_Type

[fgolemo]

@paulaurel: could you try this please: https://stackoverflow.com/questions/43019951/after-install-ros-kinetic-cannot-import-opencv

[fgolemo]

... because from what I see in the traceback you are starting your script in Python 3 but then it tries to import OpenCV for PY 2.7 and that obviously won't work.

[paulaurel]

Thank you. I am now able to import OpenCV in python 3. Yet I still cannot run the standalone.py code. I now encounter the following error

Traceback (most recent call last): File "./standalone.py", line 18, in env = gym.make(args.env_name) File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 163, in make return registry.make(id) File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 119, in make env = spec.make() File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/gym/envs/registration.py", line 86, in make env = cls(**self._kwargs) File "/home/daurel_duckietown/Documents/Bachelorarbeit/duckiesim/gym-duckietown/gym_duckietown/envs/simplesim_env.py", line 281, in init self.multiFBO, self.finalFBO = createFrameBuffers() File "/home/daurel_duckietown/Documents/Bachelorarbeit/duckiesim/gym-duckietown/gym_duckietown/envs/simplesim_env.py", line 97, in createFrameBuffers True File "/home/daurel_duckietown/.local/lib/python3.5/site-packages/pyglet/gl/lib.py", line 105, in errcheck raise GLException(msg) pyglet.gl.lib.GLException: b'invalid operation'

The error is identical to the one I encountered on my virtual machine.

[fgolemo]

@paulaurel That's the same issue as before: a problem with GL caused by the code using some platform-specific GL instructions that aren't supported by your virtual machine.

As Maxime mentioned here https://github.com/duckietown/gym-duckietown/issues/2#comment-373571330 there is no easy fix but she is working on a solution.

[paulaurel]

@fgolemo Now I am running it on a PC running ubuntu lts 16.04 not via a virtual machine.

[fgolemo]

I see. I think the issue is still related to some platform- or driver-specific OpenGL code. Could you run the command glxgears from the Ubuntu package mesa-utils and tell us which output you get and if you see any errors? Same for glxinfo > glxinfo.log and then please attach (not paste) that text file (glxinfo.log).

[paulaurel]

Here you go. Thanks for your efforts. I am really grateful. glxgears.log glxinfo.log (obtained on the PC)

[maximecb]

@paulaurel So, I pushed a tentative fix on the master branch.

Can someone with a macbook do a git pull and let me know if they can run ./standalone.py? If not, please paste the complete error message.

[paulaurel]

It works! Thank you!