Box2d won't find some RAND_LIMIT_swigconstant #100

justheuristic · 2016-05-16T02:25:50Z

Hello!

It's probably some silly mistake on my side, but i wasn't able to fix by random lever pulling, as usual.

Installing Box2d as in instuctions (using pip install -e .[all]) will throw error when trying to use some of Box2D examples.

Code that reproduces the issue:

import gym
atari = gym.make('LunarLander-v0')
atari.reset()

[2016-05-16 02:14:25,430] Making new env: LunarLander-v0

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-1-f89e78f4410b> in <module>()
      1 import gym
----> 2 atari = gym.make('LunarLander-v0')
      3 atari.reset()
      4 #plt.imshow(atari.render('rgb_array'))

/home/jheuristic/yozhik/gym/gym/envs/registration.pyc in make(self, id)
     77         logger.info('Making new env: %s', id)
     78         spec = self.spec(id)
---> 79         return spec.make()
     80 
     81     def all(self):

/home/jheuristic/yozhik/gym/gym/envs/registration.pyc in make(self)
     52             raise error.Error('Attempting to make deprecated env {}. (HINT: is there a newer registered version of this env?)'.format(self.id))
     53 
---> 54         cls = load(self._entry_point)
     55         env = cls(**self._kwargs)
     56 

/home/jheuristic/yozhik/gym/gym/envs/registration.pyc in load(name)
     11 def load(name):
     12     entry_point = pkg_resources.EntryPoint.parse('x={}'.format(name))
---> 13     result = entry_point.load(False)
     14     return result
     15 

/home/jheuristic/thenv/local/lib/python2.7/site-packages/pkg_resources/__init__.pyc in load(self, require, *args, **kwargs)
   2378         if require:
   2379             self.require(*args, **kwargs)
-> 2380         return self.resolve()
   2381 
   2382     def resolve(self):

/home/jheuristic/thenv/local/lib/python2.7/site-packages/pkg_resources/__init__.pyc in resolve(self)
   2384         Resolve the entry point from its module and attrs.
   2385         """
-> 2386         module = __import__(self.module_name, fromlist=['__name__'], level=0)
   2387         try:
   2388             return functools.reduce(getattr, self.attrs, module)

/home/jheuristic/yozhik/gym/gym/envs/box2d/__init__.py in <module>()
----> 1 from gym.envs.box2d.lunar_lander import LunarLander
      2 from gym.envs.box2d.bipedal_walker import BipedalWalker, BipedalWalkerHardcore

/home/jheuristic/yozhik/gym/gym/envs/box2d/lunar_lander.py in <module>()
      3 from six.moves import xrange
      4 
----> 5 import Box2D
      6 from Box2D.b2 import (edgeShape, circleShape, fixtureDef, polygonShape, revoluteJointDef, contactListener)
      7 

/home/jheuristic/thenv/local/lib/python2.7/site-packages/Box2D/__init__.py in <module>()
     18 # 3. This notice may not be removed or altered from any source distribution.
     19 #
---> 20 from .Box2D import *
     21 __author__ = '$Date$'
     22 __version__ = '2.3.1'

/home/jheuristic/thenv/local/lib/python2.7/site-packages/Box2D/Box2D.py in <module>()
    433     return _Box2D.b2CheckPolygon(shape, additional_checks)
    434 
--> 435 _Box2D.RAND_LIMIT_swigconstant(_Box2D)
    436 RAND_LIMIT = _Box2D.RAND_LIMIT
    437 

AttributeError: 'module' object has no attribute 'RAND_LIMIT_swigconstant'

What didn't help:

pip uninstall gym
apt-get install -y python-numpy python-dev cmake zlib1g-dev libjpeg-dev xvfb libav-tools xorg-dev python-opengl
git clone https://github.com/openai/gym
cd gym
pip install -e .[all] --upgrade

The OS is Ubuntu 14.04 Server x64
It may be a clue that i am running the thing from inside python2 virtualenv (with all numpys, etc. installed)

The text was updated successfully, but these errors were encountered:

gdb · 2016-05-16T02:27:48Z

Ah, sorry, you need to install a backported swig 3.0: https://github.com/openai/gym/blob/box2dtests/.travis.yml#L20-L22. @jonasschneider is going to add code soon to make this error more friendly. LMK if you have trouble.

justheuristic · 2016-05-16T04:26:35Z

Thanks for the response!

Ran both selected lines, but it still throws the same error message.

On another machine (ubuntu 12 x64 server), OpenAI gym wouldn't install without these lines, but after running them it started throwing these errors as well.

gdb · 2016-05-16T04:27:48Z

Hm, @jonasschneider any ideas?

jonasschneider · 2016-05-16T09:56:32Z

Ah, sorry for not following up on this yet. This seems to be a really strange regression within SWIG -- taking a look at the failing source, the swigconstant thing is just a function that the generated code assumes to be present, but it's not being defined anywhere.

One of the only references to this issue that I could dig up is http://lists.alioth.debian.org/pipermail/pkg-exppsy-pymvpa/2015q3.txt (grep for swigconstant). For them, SWIG 3.0.6 is failing, while SWIG 3.0.2 is working.

@justheuristic Could you do a swig -version to see if we have a similar case here?
(Mid-term we should nuke SWIG altogether, really.)

asmith26 · 2016-05-16T18:40:53Z

I can confirm I'm having the same problem. @jonasschneider I initially had version SWIG Version 2.0.11, then I followed @gdb comment and now I have version:

$ swig -version
SWIG Version 3.0.2
Compiled with g++ [x86_64-unknown-linux-gnu]
Configured options: +pcre
Please see http://www.swig.org for reporting bugs and further inform

Unfortunately, I'm still seeing AttributeError: 'module' object has no attribute 'RAND_LIMIT_swigconstant. Thanks

olegklimov · 2016-05-16T19:43:13Z

pybox2d builds from source in Linux and Mac just fine. SWIG is next to invisible, I have 3.0.8. I understand they were using deprecated SWIG features at a time they built pip package and it wasn't updated since then. The solution is to fix pip to fetch current sources, I believe.

olegklimov · 2016-05-16T19:54:44Z

I also noticed @jonasschneider posted pybox2d/pybox2d#82 , on the first look it says the right thing (please update pypi package). I am not familiar with pip packaging system (pypi?) so maybe I got it wrong.

asmith26 · 2016-05-16T20:38:43Z

Thanks for the response @olegklimov

I've just ensured my pip is up-to-date with sudo pip install --upgrade pip,
ensured my local gym repo is up-to-date GitHub/master,
and installed swig3.0.8 from sources at SourceForge, which required sudo apt-get install libpcre3 libpcre3-dev, (I also uninstalled swig3.0.2 that I installed above, so hopefully python should be using swig3.0.8), but unfortunately I'm still getting:

$ swig -version
SWIG Version 3.0.8
Compiled with g++ [x86_64-unknown-linux-gnu]
Configured options: +pcre
Please see http://www.swig.org for reporting bugs and further information

$ python
Python 2.7.6 (default, Jun 22 2015, 17:58:13) 
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import gym
>>> env = gym.make("LunarLander-v1")
[2016-05-16 21:29:12,097] Making new env: LunarLander-v1
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "~/git/gym/gym/envs/registration.py", line 79, in make
    return spec.make()
  File "~/git/gym/gym/envs/registration.py", line 54, in make
    cls = load(self._entry_point)
  File "~/git/gym/gym/envs/registration.py", line 13, in load
    result = entry_point.load(False)
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2229, in load
    return self.resolve()
  File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2235, in resolve
    module = __import__(self.module_name, fromlist=['__name__'], level=0)
  File "~/git/gym/gym/envs/box2d/__init__.py", line 1, in <module>
    from gym.envs.box2d.lunar_lander import LunarLander
  File "~/git/gym/gym/envs/box2d/lunar_lander.py", line 4, in <module>
    import Box2D
  File "/usr/local/lib/python2.7/dist-packages/Box2D/__init__.py", line 20, in <module>
    from .Box2D import *
  File "/usr/local/lib/python2.7/dist-packages/Box2D/Box2D.py", line 435, in <module>
    _Box2D.RAND_LIMIT_swigconstant(_Box2D)
AttributeError: 'module' object has no attribute 'RAND_LIMIT_swigconstant'

olegklimov · 2016-05-16T20:52:19Z

@asmith26 did you compile pybox2d yourself? From a fresh git clone?

tlbtlbtlb · 2016-05-16T20:58:30Z

swig is used while compiling the native code of Box2D, so after updating
swig you need re-install Box2D with

    cd Box2D-py
    python setup.py clean
    python setup.py install

On Mon, May 16, 2016 at 1:38 PM, asmith26 notifications@github.com wrote:

Thanks for the response @olegklimov https://github.com/olegklimov

I've just ensured my pip is up-to-date with sudo pip install
--upgrade pip,

ensured my local gym repo is up-to-date GitHub/master,

and installed swig3.0.8 from sources at SourceForge
https://sourceforge.net/projects/swig/?source=typ_redirect, which
required sudo apt-get install libpcre3 libpcre3-dev, (I also
uninstalled swig3.0.2 that I installed above
Box2d won't find some RAND_LIMIT_swigconstant #100 (comment), so
hopefully python should be using swig3.0.8), but unfortunately I've still
getting:

$ swig -version
SWIG Version 3.0.8
Compiled with g++ [x86_64-unknown-linux-gnu]
Configured options: +pcre
Please see http://www.swig.org for reporting bugs and further information

$ python
Python 2.7.6 (default, Jun 22 2015, 17:58:13)
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.

import gym
env = gym.make("LunarLander-v1")
[2016-05-16 21:29:12,097] Making new env: LunarLander-v1
Traceback (most recent call last):
File "", line 1, in
File "/git/gym/gym/envs/registration.py", line 79, in make
return spec.make()
File "/git/gym/gym/envs/registration.py", line 54, in make
cls = load(self._entry_point)
File "/git/gym/gym/envs/registration.py", line 13, in load
result = entry_point.load(False)
File "/usr/local/lib/python2.7/dist-packages/pkg_resources/init.py", line 2229, in load
return self.resolve()
File "/usr/local/lib/python2.7/dist-packages/pkg_resources/init.py", line 2235, in resolve
module = import(self.module_name, fromlist=['name'], level=0)
File "/git/gym/gym/envs/box2d/init.py", line 1, in
from gym.envs.box2d.lunar_lander import LunarLander
File "~/git/gym/gym/envs/box2d/lunar_lander.py", line 4, in
import Box2D
File "/usr/local/lib/python2.7/dist-packages/Box2D/init.py", line 20, in
from .Box2D import *
File "/usr/local/lib/python2.7/dist-packages/Box2D/Box2D.py", line 435, in
_Box2D.RAND_LIMIT_swigconstant(_Box2D)
AttributeError: 'module' object has no attribute 'RAND_LIMIT_swigconstant'

—
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub
#100 (comment)

Trevor Blackwell tlb@openai.com 650 776 7870

asmith26 · 2016-05-16T21:07:39Z

Many thanks @tlbtlbtlb - worked perfectly!!

justheuristic · 2016-05-17T08:41:08Z

Got it running with @tlbtlbtlb 's tip, sorry for the delay.
Thank you!

p.s. Anyone still has issues or this one can be closed?

TheBlueFrog · 2016-05-22T19:54:38Z

Still failing for me.

SWIG Version 3.0.8 (built from source)
$ swig -version
SWIG Version 3.0.8
Compiled with g++ [x86_64-unknown-linux-gnu]

$ git clone https://github.com/openai/gym
$ cd gym
$ pip install -e .
$ pip install -e .[Box2D]

PoleCart runs fine

$ cat a.py
import gym
env = gym.make('LunarLander-v1')
env.reset()
for _ in range(1000):
env.render()
env.step(env.action_space.sample()) # take a random action

$ python a.py
[2016-05-22 12:32:27,153] Making new env: LunarLander-v1
Traceback (most recent call last):
File "a.py", line 2, in
env = gym.make('LunarLander-v1')
File "/home/mike/gym/gym/envs/registration.py", line 84, in make
return spec.make()
File "/home/mike/gym/gym/envs/registration.py", line 56, in make
cls = load(self._entry_point)
File "/home/mike/gym/gym/envs/registration.py", line 14, in load
result = entry_point.load(False)
File "/home/mike/anaconda2/lib/python2.7/site-packages/setuptools-18.4 py2.7.egg/pkg_resources/init.py", line 2355, in load
File "/home/mike/anaconda2/lib/python2.7/site-packages/setuptools-18.4-py2.7.egg/pkg_resources/init.py", line 2361, in resolve
File "/home/mike/gym/gym/envs/box2d/init.py", line 1, in
from gym.envs.box2d.lunar_lander import LunarLander
File "/home/mike/gym/gym/envs/box2d/lunar_lander.py", line 4, in
import Box2D
File "/home/mike/anaconda2/lib/python2.7/site-packages/Box2D/init.py", line 20, in
from .Box2D import *
File "/home/mike/anaconda2/lib/python2.7/site-packages/Box2D/Box2D.py", line 435, in
_Box2D.RAND_LIMIT_swigconstant(_Box2D)
AttributeError: 'module' object has no attribute 'RAND_LIMIT_swigconstant'

no clue what's wrong...
mike

asmith26 · 2016-05-22T20:24:31Z

@TheBlueFrog - I don't think your pip install -e command re-installs a package. I decided to remove the package and then install again with:

sudo pip uninstall box2d-py #EDITED 'pybox2d' -> 'box2d-py'
sudo pip install box2d-py     #EDITED 'pybox2d' -> 'box2d-py'

TheBlueFrog · 2016-05-22T21:19:24Z

I do seem to have gotten past the swig issue

$ sudo pip uninstall pybox2d
Cannot uninstall requirement pybox2d, not installed
Storing debug log for failure in /home/mike/.pip/pip.log

$ sudo pip install pybox2d
Downloading/unpacking pybox2d
Could not find any downloads that satisfy the requirement pybox2d
Cleaning up...
No distributions at all found for pybox2d
Storing debug log for failure in /home/mike/.pip/pip.log

$ cat /home/mike/.pip/pip.log
/usr/bin/pip run on Sun May 22 14:14:56 2016
Downloading/unpacking pybox2d
Getting page https://pypi.python.org/simple/pybox2d/
Could not fetch URL https://pypi.python.org/simple/pybox2d/: 404 Client Error: Not Found
Will skip URL https://pypi.python.org/simple/pybox2d/ when looking for download links for pybox2d
Getting page https://pypi.python.org/simple/
URLs to search for versions for pybox2d:
https://pypi.python.org/simple/pybox2d/
Getting page https://pypi.python.org/simple/pybox2d/
Could not fetch URL https://pypi.python.org/simple/pybox2d/: 404 Client Error: Not Found
Will skip URL https://pypi.python.org/simple/pybox2d/ when looking for download links for pybox2d
Could not find any downloads that satisfy the requirement pybox2d
Cleaning up...
Removing temporary dir /tmp/pip_build_root...
No distributions at all found for pybox2d
Exception information:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main
status = self.run(options, args)
File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 278, in run
requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1178, in prepare_files
url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
File "/usr/lib/python2.7/dist-packages/pip/index.py", line 277, in find_requirement
raise DistributionNotFound('No distributions at all found for %s' % req)
DistributionNotFound: No distributions at all found for pybox2d

There is something broken in Box2D for sure...

asmith26 · 2016-05-23T10:13:25Z

Try:

sudo pip uninstall box2d-py
sudo pip install box2d-py

TheBlueFrog · 2016-05-23T17:19:17Z

weirder
installing box2d as root gives me a ImportError: No module named Box2D
installing as user gives me AttributeError: 'module' object has no attribute 'RAND_LIMIT_swigconstant'

I note warnings when installing box2d as root that I don't get when
installing as user...

I'm getting the sense that there are two different box2d's around but
I don't know enough about pip to track it down...

$ pwd
/home/mike/gym
$ ls -l /usr/bin/sw*
lrwxrwxrwx 1 root root 16 May 22 12:04 /usr/bin/swig -> /usr/bin/swig3.0
-rwxr-xr-x 1 root root 1507832 May 19 2015 /usr/bin/swig3.0
$ swig -version
SWIG Version 3.0.8

$ pip uninstall box2d-py
Cannot uninstall requirement box2d-py, not installed
$ sudo pip uninstall box2d-py
Cannot uninstall requirement box2d-py, not installed
Storing debug log for failure in /home/mike/.pip/pip.log

$ sudo pip install box2d-py
Downloading/unpacking box2d-py
Downloading box2d-py-2.3.1.tar.gz (425kB): 425kB downloaded
Running setup.py (path:/tmp/pip_build_root/box2d-py/setup.py) egg_info for package box2d-py
Using setuptools (version 3.3).
warning: no files found matching 'INSTALL'
warning: no files found matching 'MANIFEST'
warning: no files found matching 'README'
warning: no files found matching 'distribute_setup.py'
warning: no files found matching '.py' under directory 'Box2D'
warning: no files found matching '.c' under directory 'Box2D'
Installing collected packages: box2d-py
Running setup.py install for box2d-py
Using setuptools (version 3.3).
building 'Box2D.Box2D' extension
swigging Box2D/Box2D.i to Box2D/Box2D_wrap.cpp
swig -python -c++ -IBox2D -small -O -includeall -ignoremissing -w201 -globals b2Globals -outdir library/Box2D -keyword -w511 -D_SWIG_KWARGS -o Box2D/Box2D_wrap.cpp Box2D/Box2D.i
Box2D/Common/b2Math.h:67: Warning 302: Identifier 'b2Vec2' redefined by %extend (ignored),
Box2D/Box2D_math.i:47: Warning 302: %extend definition of 'b2Vec2'.
///////////////// stuff deleted here ////////////////
warning: no files found matching 'INSTALL'
warning: no files found matching 'MANIFEST'
warning: no files found matching 'README'
warning: no files found matching 'distribute_setup.py'
warning: no files found matching '.py' under directory 'Box2D'
warning: no files found matching '_.c' under directory 'Box2D'
Successfully installed box2d-py
Cleaning up...

$ cat b.py
import gym
env = gym.make('LunarLander-v1')
env.reset()
for _ in range(1000):
env.render()
env.step(env.action_space.sample()) # take a random action

$ python b.py
[2016-05-23 10:12:29,394] Making new env: LunarLander-v1
Traceback (most recent call last):
File "b.py", line 2, in
env = gym.make('LunarLander-v1')
File "/home/mike/gym/gym/envs/registration.py", line 84, in make
return spec.make()
File "/home/mike/gym/gym/envs/registration.py", line 56, in make
cls = load(self._entry_point)
File "/home/mike/gym/gym/envs/registration.py", line 14, in load
result = entry_point.load(False)
File "/home/mike/anaconda2/lib/python2.7/site-packages/setuptools-18.4-py2.7.egg/pkg_resources/init.py", line 2355, in load
File "/home/mike/anaconda2/lib/python2.7/site-packages/setuptools-18.4-py2.7.egg/pkg_resources/init.py", line 2361, in resolve
File "/home/mike/gym/gym/envs/box2d/init.py", line 1, in
from gym.envs.box2d.lunar_lander import LunarLander
File "/home/mike/gym/gym/envs/box2d/lunar_lander.py", line 4, in
import Box2D
ImportError: No module named Box2D

// ///////////////////// try installing as user /////////////////////////////////

$ sudo pip uninstall box2d-py
Uninstalling box2d-py:
/usr/local/lib/python2.7/dist-packages/Box2D/Box2D.py
/usr/local/lib/python2.7/dist-packages/Box2D/Box2D.pyc
/usr/local/lib/python2.7/dist-packages/Box2D/_Box2D.so
/usr/local/lib/python2.7/dist-packages/Box2D/init.py
/usr/local/lib/python2.7/dist-packages/Box2D/init.pyc
/usr/local/lib/python2.7/dist-packages/Box2D/b2/init.py
/usr/local/lib/python2.7/dist-packages/Box2D/b2/init.pyc
/usr/local/lib/python2.7/dist-packages/box2d_py-2.3.1.egg-info
Proceed (y/n)? y
Successfully uninstalled box2d-py
$ pip uninstall box2d-py
Cannot uninstall requirement box2d-py, not installed
$ pip install box2d-py
Collecting box2d-py
Installing collected packages: box2d-py
Successfully installed box2d-py-2.3.1

$ python b.py
[2016-05-23 10:14:41,000] Making new env: LunarLander-v1
Traceback (most recent call last):
File "b.py", line 2, in
env = gym.make('LunarLander-v1')
File "/home/mike/gym/gym/envs/registration.py", line 84, in make
return spec.make()
File "/home/mike/gym/gym/envs/registration.py", line 56, in make
cls = load(self._entry_point)
File "/home/mike/gym/gym/envs/registration.py", line 14, in load
result = entry_point.load(False)
File "/home/mike/anaconda2/lib/python2.7/site-packages/setuptools-18.4-py2.7.egg/pkg_resources/init.py", line 2355, in load
File "/home/mike/anaconda2/lib/python2.7/site-packages/setuptools-18.4-py2.7.egg/pkg_resources/init.py", line 2361, in resolve
File "/home/mike/gym/gym/envs/box2d/init.py", line 1, in
from gym.envs.box2d.lunar_lander import LunarLander
File "/home/mike/gym/gym/envs/box2d/lunar_lander.py", line 4, in
import Box2D
File "/home/mike/anaconda2/lib/python2.7/site-packages/Box2D/init.py", line 20, in
from .Box2D import *
File "/home/mike/anaconda2/lib/python2.7/site-packages/Box2D/Box2D.py", line 435, in
_Box2D.RAND_LIMIT_swigconstant(_Box2D)
AttributeError: 'module' object has no attribute 'RAND_LIMIT_swigconstant'
$

TheBlueFrog · 2016-05-23T17:24:26Z

ah, when boxd is installed as root I note this
File "/home/mike/gym/gym/envs/box2d/init.py", line 1, in

but when installed as user
File "/home/mike/anaconda2/lib/python2.7/site-packages/Box2D/init.py", line 20, in
from .Box2D import *

jachiam · 2016-06-10T01:53:37Z

Encountered this same issue. Ultimately appears to have resolved thanks to @tlbtlbtlb's tip.

I had to install Box2D from source, though; the pip install did not work.

jietang · 2016-06-13T18:20:07Z

@TheBlueFrog any updates here? Are you stuck at the same point with Box2D?

Ivanopolo · 2016-06-27T20:18:35Z

Same here. SWIG Version 3.0.10. Tried removing and reinstalling gym and box2d-py to no meaningful result.

Update: I managed to get it work by removing the Box2D installed with the gym and installing the new one from the git repository. It's important to remove all Box2D files before installation, because 'setup.py clean' doesn't do it.

bram1et · 2016-07-01T17:30:03Z

In a similar vain to @Ivanopolo I uninstalled my pip installation of box2d-py via sudo pip uninstall box2d-py then built from source following instructions found here.

rdevon · 2016-09-05T16:16:14Z

On OSX, I was able to resolve the issue by following the instructions posted by @bram1et and @Ivanopolo.

jaekyeom · 2016-10-01T08:51:01Z

I'd like to share my experience for those who are still having this issue.

On Ubuntu 14.04, I tried using swig 3.0.2 and 3.0.10 built from the source, but none of them worked.
But manually (re)installing pybox2d from scratch by cloning the git repository, after enabling swig 3.0.8 built from the source, solved my problem.

zuoxingdong · 2016-11-09T14:07:05Z

I had the same issue, and after following the instruction suggested above, i.e. pip uninstall box2d-py and then build from source for Box2D.

It leads to a new error:

ImportError: No module named 'Box2D.b2'

I am using Python 3 under Ubuntu 16.04 LTS, and all commands are running within an Anaconda environment. I had both conda install swig (latest version 3.0.10) and apt-get install swig (latest version 3.0.8)

kengz · 2016-11-12T02:18:34Z

End-to-end, explicit steps for fixing this problem (at least for MacOSX), save u the hunt for instructions scattered here and there:

brew install cmake boost boost-python sdl2 swig wget
git clone https://github.com/openai/gym.git
cd gym
pip install -e '.[all]'

Try to run a Lunar Lander env, it will break (unless they fix it):

import gym
env = gym.make('LunarLander-v2')
env.reset()
env.render()

If it fails, debug as follow (and repeat once more if it fails again, glorious python):

pip3 uninstall Box2D box2d-py
git clone https://github.com/pybox2d/pybox2d
cd pybox2d/
python setup.py clean
python setup.py build
python setup.py install

tarvos21 · 2017-03-20T15:52:08Z

Hi, @Instassa, it seems that your computer has not installed the box2d module successfully as expected, I guess there might exist some problems in directory path or python version, I see you are using anaconda's environment. Did you uninstall the original box2d module coming along with gym module completely?

Instassa · 2017-03-20T16:11:49Z

Hi @tarvos21, if you mean originally before this:

git clone https://github.com/pybox2d/pybox2d cd pybox2d/
python setup.py clean
python setup.py build
python setup.py install

then I think yes, as my error first looks like AttributeError: module '_Box2D' has no attribute 'RAND_LIMIT_swigconstant'.
But after I perform the above series of commands I get ModuleNotFoundError: No module named '_Box2D'.

garibarba · 2017-04-10T22:25:34Z

If installing swig3.0 is not an option, here is a workaround.
From https://github.com/pybox2d/pybox2d/blob/master/INSTALL.md, install a pre-built conda package of pybox2d with conda install -c https://conda.anaconda.org/kne pybox2d.
Don't forget to first uninstall previous versions with pip uninstall Box2D box2d-py.

kengz · 2017-04-11T23:38:24Z

This had to be fixed, so I did. The local installation works now. Submitted the PR above, hope the team reviews soon.

For those who can't wait, just install your gym from pip install -e git+https://github.com/kengz/gym.git#egg=gym[all]

This reverts commit 95ec4c1.

sdr2002 · 2017-07-03T17:19:40Z

Sorry but the issue is still not solved in clusters.
I have installed gym, Box2D via pip and for another chance I went with @kengz 's one, and both didn't work.
In local machines there are no problems but in the cluster(mine I have is Gridengine's) it is.
I got an error left below, so could you check this out? Thx.

----------------------------------------

Collecting PyOpenGL (from gym[all])
Using cached PyOpenGL-3.1.0.tar.gz
Collecting Box2D-kengz (from gym[all])
Using cached Box2D-kengz-2.3.3.tar.gz
Collecting keras (from gym[all])
Using cached Keras-2.0.5.tar.gz
Collecting theano (from gym[all])
Using cached Theano-0.9.0.tar.gz
Collecting atari_py>=0.0.21 (from gym[all])
Using cached atari-py-0.1.1.tar.gz
Collecting Pillow (from gym[all])
Using cached Pillow-4.2.0-cp27-cp27mu-manylinux1_x86_64.whl
Collecting pachi-py>=0.0.19 (from gym[all])
Using cached pachi-py-0.0.21.tar.gz
Collecting mujoco_py>=0.4.3 (from gym[all])
Using cached mujoco-py-1.50.1.0.tar.gz
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "", line 1, in
File "/tmp/pip-build-B8ZkMp/mujoco-py/setup.py", line 2, in
import importlib.util
ImportError: No module named util

----------------------------------------

Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-build-B8ZkMp/mujoco-py/

"python setup.py egg_info" failed with error code 1 in /tmp/pip-build-B8ZkMp/mujoco-py/

onaclov2000 · 2017-07-31T20:53:42Z

nothing is working for me, I can't get my gym to uninstall due to this listed in freeze;

-e git+https://github.com/kengz/gym.git@b943b0ed2a00893f9eab37dcb13ca6f062005f12#egg=gym

EDIT went and removed the egg-link from /usr/local/python2.7/dist-packages

I still am unable to install anything and suspect everything is broken now.

jrversteegh · 2017-08-01T15:06:46Z

@kengz Your pull request appears to have been merged, but the issue still persists.
Latest master from github.com/openai/gym and pip install -e '.[all]'
AttributeError: module 'Box2D._Box2D' has no attribute 'RAND_LIMIT'

Removing with pip uninstall Box2D-kengz, then cloning github.com/pybox2d/pybox2d and doing a pip install -e . makes things work.

mklissa · 2017-08-07T16:35:51Z

@jrversteegh that worked for me! thanks

LUKELIEM · 2017-08-27T17:39:57Z

Just wondering, when will the Box2d issue be completely resolved in https://github.com/openai/gym so that we do not have to deal with all these workarounds?

weiliu620 · 2017-09-13T20:08:49Z

@jrversteegh does not work for me.

fedden · 2017-10-08T10:39:33Z

@jrversteegh that sorted it - thank you

solomatov · 2018-12-21T02:23:52Z

This issue is still reproducible:

AttributeError: module '_Box2D' has no attribute 'RAND_LIMIT_swigconstant'

I was using the LunarLander-v2 environment

sprakashdash · 2018-12-24T06:12:31Z

@solomatov When are you getting this error? Please put your code if my code doesnot solves the issue.
While I was running this:
import gym
atari = gym.make('LunarLander-v2')
atari.reset()
It showed me perfectly without any error:
array([ 0.00286407, 1.4008762 , 0.29008052, -0.44640478, -0.00331193, -0.06570757, 0. , 0. ], dtype=float32)

kengz · 2019-01-08T17:39:13Z

Seems like this is already fixed in the latest gym release using the proper box2d-py>=2.3.5 (the box2d-kengz hack had been replaced). I can confirm with plain pip install gym[box2d] on both MacOS and Linux Ubuntu, then checking with

import gym
gym.make('LunarLander-v2')

should pass without problem.

eambutu · 2019-03-30T01:51:27Z

For anyone still hitting this issue: you need to pip3 install box2d-py, and not pip3 install Box2d, as I mistakenly did.

Taospirit · 2020-07-09T08:59:24Z

@kengz Your pull request appears to have been merged, but the issue still persists.
Latest master from github.com/openai/gym and pip install -e '.[all]'
AttributeError: module 'Box2D._Box2D' has no attribute 'RAND_LIMIT'

Removing with pip uninstall Box2D-kengz, then cloning github.com/pybox2d/pybox2d and doing a pip install -e . makes things work.

thx, that worked for me!

see openai/gym#100 (comment)

* update to gym 0.23.1 * update HER * check for gym v0.26 and add info on vecenv wrapping of new gym API * check for gym v0.26 and update box2D installation see openai/gym#100 (comment) * update to gym v0.26 API * update to gym v0.26 * Fixes and reformat * Switch to Gymnasium --------- Co-authored-by: tlpss <thomas17.lips@gmail.com> Co-authored-by: Antonin Raffin <antonin.raffin@ensta.org>

justheuristic closed this as completed May 16, 2016

justheuristic reopened this May 16, 2016

jonasschneider self-assigned this May 16, 2016

jonasschneider mentioned this issue Jun 29, 2016

Fix box2d tests #98

Closed

kengz added a commit to kengz/gym that referenced this issue Apr 11, 2017

fix issue openai#100 with new Box2D-kengz dependency

b943b0e

kengz mentioned this issue Apr 11, 2017

fix issue #100 with new Box2D-kengz dependency #558

Merged

gdb closed this as completed in #558 Apr 22, 2017

gdb pushed a commit that referenced this issue Apr 22, 2017

fix issue #100 with new Box2D-kengz dependency (#558)

95ec4c1

gdb added a commit that referenced this issue Apr 23, 2017

Revert "fix issue #100 with new Box2D-kengz dependency (#558)"

4f0c8ab

This reverts commit 95ec4c1.

yuvalewi mentioned this issue Jun 9, 2017

Box2D cannot be imported in a tensorflow env #615

Closed

onaclov2000 mentioned this issue Jul 15, 2017

AttributeError: module 'Box2D._Box2D' has no attribute 'RAND_LIMIT' #647

Closed

sof mentioned this issue Jul 21, 2017

(Example of) support for multi-valued Box actions? tensorforce/tensorforce#44

Closed

Omegastick mentioned this issue Apr 24, 2018

Box2d won't find some RAND_LIMIT_swigconstant #1015

Closed

ryanjulian mentioned this issue Aug 1, 2018

Missing attribute 'RAND_LIMIT' in modules Box2D rlworkgroup/garage#250

Closed

naeioi mentioned this issue Oct 8, 2018

Box2D breaks in fresh installation on Ubuntu rlworkgroup/garage#334

Closed

worikgh mentioned this issue Oct 7, 2019

Not all ids from OpenAI recognised MrRobb/gym-rs#7

Closed

tlpss added a commit to arjun-kg/rl-colab-notebooks that referenced this issue Oct 13, 2022

check for gym v0.26 and update box2D installation

1e6cbc9

see openai/gym#100 (comment)

Box2d won't find some RAND_LIMIT_swigconstant #100

Box2d won't find some RAND_LIMIT_swigconstant #100

Comments

justheuristic commented May 16, 2016

gdb commented May 16, 2016

justheuristic commented May 16, 2016 • edited Loading

gdb commented May 16, 2016

jonasschneider commented May 16, 2016

asmith26 commented May 16, 2016 • edited Loading

olegklimov commented May 16, 2016

olegklimov commented May 16, 2016

asmith26 commented May 16, 2016 • edited Loading

olegklimov commented May 16, 2016

tlbtlbtlb commented May 16, 2016

asmith26 commented May 16, 2016

justheuristic commented May 17, 2016 • edited Loading

TheBlueFrog commented May 22, 2016

asmith26 commented May 22, 2016 • edited Loading

TheBlueFrog commented May 22, 2016 • edited Loading

asmith26 commented May 23, 2016

TheBlueFrog commented May 23, 2016

TheBlueFrog commented May 23, 2016

jachiam commented Jun 10, 2016

jietang commented Jun 13, 2016

Ivanopolo commented Jun 27, 2016 • edited Loading

bram1et commented Jul 1, 2016

rdevon commented Sep 5, 2016

jaekyeom commented Oct 1, 2016 • edited Loading

zuoxingdong commented Nov 9, 2016 • edited Loading

kengz commented Nov 12, 2016

tarvos21 commented Mar 20, 2017

Instassa commented Mar 20, 2017

garibarba commented Apr 10, 2017

kengz commented Apr 11, 2017

sdr2002 commented Jul 3, 2017 • edited Loading

onaclov2000 commented Jul 31, 2017 • edited Loading

jrversteegh commented Aug 1, 2017 • edited Loading

mklissa commented Aug 7, 2017

LUKELIEM commented Aug 27, 2017

weiliu620 commented Sep 13, 2017

fedden commented Oct 8, 2017

solomatov commented Dec 21, 2018

sprakashdash commented Dec 24, 2018

kengz commented Jan 8, 2019

eambutu commented Mar 30, 2019

Taospirit commented Jul 9, 2020

justheuristic commented May 16, 2016 •

edited

Loading

asmith26 commented May 16, 2016 •

edited

Loading

asmith26 commented May 16, 2016 •

edited

Loading

justheuristic commented May 17, 2016 •

edited

Loading

asmith26 commented May 22, 2016 •

edited

Loading

TheBlueFrog commented May 22, 2016 •

edited

Loading

Ivanopolo commented Jun 27, 2016 •

edited

Loading

jaekyeom commented Oct 1, 2016 •

edited

Loading

zuoxingdong commented Nov 9, 2016 •

edited

Loading

sdr2002 commented Jul 3, 2017 •

edited

Loading

onaclov2000 commented Jul 31, 2017 •

edited

Loading

jrversteegh commented Aug 1, 2017 •

edited

Loading