[D66] Duodecimal python library [new]

[René Oudeweg]

[Deze implementatie bestond nog niet...]

https://github.com/juggao/duodecimal/tree/main


I've created a native base-12 arithmetic library that stores and 
computes numbers entirely in duodecimal representation! Here are the key 
features:

Core Capabilities:

* Native Base-12 Storage: Numbers stored as lists of digits [0-11], 
using 'X' for 10 and 'E' for 11
* All Four Basic Operations: Addition, subtraction, multiplication, and 
division implemented in pure base-12
* Configurable Precision: Context-based precision control (like Python's 
decimal module)
* Multiple Input Formats: Can create from base-12 strings, decimals, or 
other Duodecimal objects

Key Advantages Demonstrated:

1/3 is exact: Duodecimal("1") / Duodecimal("3") gives exactly 0.4 in base-12
1/4 is exact: Perfect representation (unlike some bases)
1/6 terminates: Another advantage of 12's factorization

The Tradeoff:

1/5 becomes infinite in base-12, just like 1/3 is infinite in decimal
This demonstrates that no base eliminates rounding—it only shifts which 
fractions terminate.