A naive representation of Kharosthi numerals, and a way to do simple arithmetic on them (actually, we're cheating and doing arithmetic on int versions of the numbers).
Currently only supports numbers less than 10000. The naive conversion algorithm currently can't deal with arbitrarily big numbers, so we only support "𐩇" with a maximum value of 9 in front of it.
Also, 0 and negative integers are not representable in Kharosthi, and not valid numbers.
Python >= 3.6
from kharosthi.numbers import KharosthiNumber as K
sum = K.from_int(5) + K.from_int(50)
# 7 - 4 = 3
int(difference) = K("𐩃𐩂") - K("𐩃")