Problems pip installing Box2D

Question

I'm learning Reinforcement learning and I'm having the following errors.

Error(1) = I can't set up the 'CarRacing-v0' gym environment without Box2D

Error(2) = I can't pip install the Box2D module.

Does someone know how to interpret these errors and help me fix this?

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Edit:

When trying to pip install box2d-py I get this error:

Solution 1

Windows users need to do as follows:

• Download SWIG with the prebuilt executable and extract somewhere on your PC. Please note: I don't think SWIG 4.0 is compatible with Box2D yet, at time of writing SWIG 3.0.12 must be used.
• Add the SWIG directory containing swig.exe to system PATH environment variable.
• Install Microsoft Visual C++ 14.0. Get it with "Microsoft Visual C++ Build Tools".
• pip install box2d
• pip install box2d-py

Solution 2

Mac users should try:

1. brew install swig
2. pip install box2d-py
3. pip install box2d

terminates without errors under macOS Mojave (10.14)

Solution 3

Based on gym's setup.py, it appears that the Box2D it is trying to import comes from the optional dependency box2d-py, so you need to run pip install box2d-py.

Solution 4

For Ubuntu 18.04, the following solved my problem with gym and lunar lander :

pip3 install box2d-py

View more solutions

Comments

[Oliver G]

When I try that I get another error (see edited question).

[Oliver G]

Does the new error give you any idea what the problem is? I am still trying to get this to work.

[Krishna]

Hi @OliverG , you found any solution? I'm also stuck on the same for a few days.

[Oliver G]

@krishna I have yet to find a solution.

[Krishna]

I got past that solution but there is another error again. I used !apt-get update !apt-get install golang libcupti-dev libjpeg-turbo8-dev make tmux htop chromium-browser git cmake zlib1g-dev libjpeg-dev xvfb libav-tools xorg-dev python-opengl libboost-all-dev libsdl2-dev swig !pip install Box2D !apt-get install python-box2d !pip install box2d-py You can try this answer as well : stackoverflow.com/a/50719412/7699859

[Oliver G]

I am using windows. Do you know how to do this on windows or how to fix the error I posted?

[Dima Fomin]

I wonder if it needs exactly MS VC++ 14.0? I've just installed MS VC Build Tools 2019, but swig do NOT see it during pip install box2d :(

[BigBadMe]

I'm not sure. I'm running Build Tools 2017 so if you're having problems then perhaps try that. It can be downloaded here: visualstudio.microsoft.com/vs/older-downloads Also remember if you have amended your PATH variable then you need to start a new cmd prompt to pick up the changes. If you run swig.exe from a command prompt you should get a response back.

[davidfrancis]

Great post, thanks. Be careful to download the right tools from the Microsoft site - I had to open the group "Tools for Visual Studio 2019" and then click on "Build Tools for Visual Studio 2019". Then the option to install the Microsoft Visual C++ Build Tools is shown during installation. It was a 1 GB approx download

[Codeoneb]

pip install gym==0.7.4 install this version of gym firsrt then just use this command

[nosh]

What will pip install Box2D do? How will it fix the installation errors? Is it a suggested equivalent?

[Vijayabhaskar J]

It worked for me on WIN10, I don't know why you got downvoted.