PM2Ring

#!/usr/bin/env python3

''' AES ECB

    Call the AES_set_encrypt_key, AES_set_decrypt_key, and 
    AES_ecb_encrypt functions from the OpenSSL library

    Uses info from /usr/include/openssl/aes.h
    Also see https://boringssl.googlesource.com/boringssl/+/2490/include/openssl/aes.h

PM2Ring

#!/usr/bin/env python3

''' sha1_demo

    An implementation of SHA-1 in pure Python 3

    Built from the pseudocode at
    https://en.wikipedia.org/wiki/SHA-1#SHA-1_pseudocode

    Written by PM 2Ring 2017.10.01

PM2Ring

#!/usr/bin/env python3

''' Testing a Bloom filter implementation

    See https://en.wikipedia.org/wiki/Bloom_filter

    Written by PM 2Ring 2017.09.29
'''

from random import seed, randrange

PM2Ring

#! /usr/bin/env python3

''' iso_ellipse. An ellipse that touches an isoceles triangle at the 
    midpoint of its base and at a given distance on the sides.

    The apex of the triangle is at the origin, with the triangle's axis
    on the +X axis. The slopes of the equal sides are m and -m,
    the "height" is V, so the other 2 vertices are at (V, mV) and (V, -mV).

    We want an ellipse that's tangential to the triangle at (X, Y) and (X, -Y)

PM2Ring

PM2Ring

PM2Ring

#!/usr/bin/env python3

''' algorithmx_spotit

    Generate small Spot-It decks by brute force searching for
    the exact cover of pairs of cards which share a symbol.

    Uses Knuth's Algorithm X for the exact cover problem.
    The Algorithm X code, using dicts instead of doubly-linked
    circular lists was written by Ali Assaf.

PM2Ring

#!/usr/bin/env python3

''' Case-insensitive string class

    A string class that uses lower-case hashing and comparisons.
    It also uses case-insensitive comparison when compared with 
    normal `str` strings.
    
    CIStr defines all 6 rich comparison methods, although only
    the `__eq__` method is needed for dictionary and set use.

PM2Ring

#!/usr/bin/env python3

''' A Tkinter viewer for named PIL Images

    Image windows can be iconified / deiconified individually via buttons
    in the main viewer window, or iconified / deiconified en masse by
    iconifying / deiconifying the main viewer window.

    Written by PM 2Ring 2017.07.16
'''

PM2Ring

#! /usr/bin/env python3

''' Demonstrate the PIL .fromarray bitmap bug

    PIL's Image.fromarray function has a bug with mode '1' images

    See
    https://stackoverflow.com/questions/2761645/error-converting-pil-bw-images-to-numpy-arrays

    Written by PM 2Ring 2017.06.26