Pymunk error when trying to run the basic example

[sai-prasanna]

I created a new conda env with python 3.8 and tried to run the basic example,

import gym
import xmagical

# This must be called before making any Gym envs.
xmagical.register_envs()

# List all available environments.
print(xmagical.ALL_REGISTERED_ENVS)

# Create a demo variant for the SweepToTop task with a gripper agent.
env = gym.make('SweepToTop-Gripper-Pixels-Allo-Demo-v0')
obs = env.reset()

I get the following error trace,

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/ramans/miniconda3/envs/xmagical/lib/python3.8/site-packages/gym/wrappers/order_enforcing.py", line 16, in reset
    return self.env.reset(**kwargs)
  File "/home/ramans/miniconda3/envs/xmagical/lib/python3.8/site-packages/xmagical/benchmarks/sweep_to_top.py", line 192, in reset
    obs = super().reset()
  File "/home/ramans/miniconda3/envs/xmagical/lib/python3.8/site-packages/xmagical/base_env.py", line 201, in reset
    self.add_entities([self._arena])
  File "/home/ramans/miniconda3/envs/xmagical/lib/python3.8/site-packages/xmagical/base_env.py", line 140, in add_entities
    entity.setup(self.renderer, self._space, self._phys_vars)
  File "/home/ramans/miniconda3/envs/xmagical/lib/python3.8/site-packages/xmagical/entities/arena.py", line 38, in setup
    self.add_to_space(*arena_segments)
  File "/home/ramans/miniconda3/envs/xmagical/lib/python3.8/site-packages/xmagical/entities/base.py", line 100, in add_to_space
    _add(obj)
  File "/home/ramans/miniconda3/envs/xmagical/lib/python3.8/site-packages/xmagical/entities/base.py", line 80, in _add
    self.space.add(obj)
  File "/home/ramans/miniconda3/envs/xmagical/lib/python3.8/site-packages/pymunk/space.py", line 401, in add
    self._add_shape(o)
  File "/home/ramans/miniconda3/envs/xmagical/lib/python3.8/site-packages/pymunk/space.py", line 441, in _add_shape
    assert (
AssertionError: The shape's body must be added to the space before (or at the same time) as the shape.

Would this be due to some version pinning issue?

[jonzamora]

Similar issue here, any help will be greatly appreciated!

[sai-prasanna]

@jonzamora I managed to fix it by installing pymunk 5.7.0

pip install pymunk==5.7.0

[jonzamora]

That worked, thanks! @sai-prasanna

[kevinzakka]

Hi, apologies for the late reply. I just tried a fresh conda install with python 3.8 and ran the steps outlined in install from source and it works fine with pymunk==5.6.0. Did you pip install or install from source?

[sai-prasanna]

@kevinzakka I installed from pypi pip install x-magical

[kevinzakka]

@sai-prasanna Thanks! Looks like i had specific versions in the requirements file but not in setup.py. Should now hopefully work in version 0.0.4!