decimal_to_scientific.py

from collections import namedtuple
from functools import reduce

Scientific = namedtuple("Scientific", "coefficient exponent")

def decimal_to_scientific(dec):
    sign, digits, exp = dec.as_tuple()
    coeff = reduce(lambda x, y: (x * 10) + y, digits, 0)
    return Scientific(-coeff if sign else coeff, exp)