PyGame : How to use Box2D python package - part 001.

About this python package the official GitHub comes with this intro:
pybox2d is a 2D physics library for your games and simple simulations. It's based on the Box2D library, written in C++. It supports several shape types (circle, polygon, thin line segments), and quite a few joint types (revolute, prismatic, wheel, etc.).
In the first step, you need to install the swig Fedora package.
About swig the official webpage tells us:
SWIG is an interface compiler that connects programs written in C and C++ with scripting languages such as Perl, Python, Ruby, and Tcl. It works by taking the declarations found in C/C++ header files and using them to generate the wrapper code that scripting languages need to access the underlying C/C++ code. In addition, SWIG provides a variety of customization features that let you tailor the wrapping process to suit your application.
I install it with DNF tool:

[root@desk mythcat]# dnf install swig.x86_64
Last metadata expiration check: 0:00:43 ago on Thu 26 Dec 2019 10:40:53 PM EET.
Dependencies resolved.
====================================================================================
 Package         Architecture      Version                 Repository          Size
====================================================================================
Installing:
 swig            x86_64            4.0.1-3.fc31            updates            1.4 M

Transaction Summary
====================================================================================
Install  1 Package

Total download size: 1.4 M
Installed size: 5.7 M
Is this ok [y/N]: y
Downloading Packages:
swig-4.0.1-3.fc31.x86_64.rpm                        1.7 MB/s | 1.4 MB     00:00    
------------------------------------------------------------------------------------
Total                                               863 kB/s | 1.4 MB     00:01     
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
  Preparing        :                                                            1/1 
  Installing       : swig-4.0.1-3.fc31.x86_64                                   1/1 
  Running scriptlet: swig-4.0.1-3.fc31.x86_64                                   1/1 
  Verifying        : swig-4.0.1-3.fc31.x86_64                                   1/1 

Installed:
  swig-4.0.1-3.fc31.x86_64                                                          

Complete!

I used the last version of the Box2D python package:

[mythcat@desk ~]$ git clone https://github.com/pybox2d/pybox2d
Cloning into 'pybox2d'...
remote: Enumerating objects: 2922, done.
remote: Total 2922 (delta 0), reused 0 (delta 0), pack-reused 2922
Receiving objects: 100% (2922/2922), 9.12 MiB | 4.04 MiB/s, done.
Resolving deltas: 100% (1832/1832), done.
[mythcat@desk ~]$ cd pybox2d/
[mythcat@desk pybox2d]$ python setup.py clean
Using setuptools (version 41.2.0).
running clean
[mythcat@desk pybox2d]$ python setup.py build
Using setuptools (version 41.2.0).
running build
running build_py
creating build
creating build/lib.linux-x86_64-3.7
creating build/lib.linux-x86_64-3.7/Box2D
...
[mythcat@desk pybox2d]$ python setup.py install --user
Using setuptools (version 41.2.0).
running install
running bdist_egg
running egg_info
...
Processing dependencies for Box2D==2.3.2
Finished processing dependencies for Box2D==2.3.2

Let's try these two examples from the official webpage:

[mythcat@desk ~]$ python3 simple_01.py
pygame 1.9.6
Hello from the pygame community. https://www.pygame.org/contribute.html
Done!
[mythcat@desk ~]$ python3 simple_02.py
pygame 1.9.6
Hello from the pygame community. https://www.pygame.org/contribute.html
Done!

These screenshots results for the first script:

... and for the second one: