chrpak, a Python code which can handle characters and strings.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
chrpak is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and an Octave version and a Python version.
caesar, a Python code which can apply a Caesar Shift Cipher to a string of text.
file_name_sequence, a Python code which demonstrates ways to generate a sequence of filenames that can be used when generating images for an animation.
rot13, a Python code which can encipher a string using the ROT13 cipher for letters, and the ROT5 cipher for digits.