These programs, {\tt rsa.py} and {\tt bridges.py} need to be run with Python3, so install that as suggested by \link{https://www.python.org/downloads/}.
The package manager {\tt pip} is also necessary for installation of third party graphics libraries such as {\tt NetworkX}. Install that as described here: \link{https://pip.pypa.io/en/stable\-/installing/}.

Now that those tools are available, run the following shell commands to install relevant libraries:
{\tt\obeylines\parindent=2in%
\$ pip install networkx
}

Each file should be executable with ``{\tt python3 \$filename}''.