Human UX strings mapping

trepid.py

"""
Human UX strings mapping

See http://stackoverflow.com/a/27459196

0 1 2 3 4 5 6 7 8 9 A B C D E F     Hexadecimal
H M N 3 4 P 6 7 R 9 T W C X Y F     Replacement

Y = U = V
C = G
X = K
F = E
"""
import string

trans_table = string.maketrans(
    "HMN34P67R9TWCGXKYUVFE",
    "0123456789ABCCDDEEEFF"
)

def translate(str):
    """Normalize to an unambiguous Base16 string

    >>> translate("hmn34P67r9")
    '0123456789'

    >>> translate("WCGXKYUVFE")
    'BCCDDEEEFF'
    """
    return str.upper().translate(trans_table)