Small python script to show exponential growth

exponential_growth.py

import locale
import math

import tableprint as tp

locale.setlocale(locale.LC_ALL, "")

class Expo_Growth:
    def __init__(self, start=0, stop=10, words=True):

        self.millnames = ['', '', ' Million', ' Billion', ' Trillion', ' Quadrillion', ' Quintillion',
                           ' Sextillion', '  Septillion', ' Octillion', ' Nonillion', ' Decillion', ' Undecillion',
                           ' Duodecillion', ' Tredecillion', ' Quatttuor-decillion', ' Quindecillion', ' Sexdecillion',
                           ' Septen-decillion', ' Octodecillion', ' Novemdecillion', ' Vigintillion',
                           ' Unvigintillion', 'Duovigintillion', ' Tresvigintillion', ' Quattuorvigintillion',
                           ' Quinquavigintillion', ' Sesvigintillion', ' Septemvigintillion', ' Octovigintillion',
                           ' Novemvigintillion', ' Trigintillion', ' Untrigintillion', ' Duotrigintillion',
                           ' Trestrigintillion', ' Quattuortrigintillion', ' Quinquatrigintillion',
                           ' Sestrigintillion', ' Septentrigintillion', ' Octotrigintillion', ' Noventrigintillion',
                           ' Quadragintillion', ' Quinquagintillion', ' Sexagintillion', ' Septuagintillion',
                           ' Octogintillion', ' Nonagintillion', ' Centillion', ' Uncentillion', ' Decicentillion',
                           ' Undecicentillion', ' Viginticentillion', ' Unviginticentillion', ' Trigintacentillion',
                           ' Quadragintacentillion', ' Quinquagintacentillion', ' Sexagintacentillion',
                           ' Septuagintacentillion', ' Octogintacentillion', ' Nonagintacentillion', ' Ducentillion',
                           ' Trecentillion', ' Quadringentillion', ' Quingentillion', ' Sescentillion',
                           ' Septingentillion', ' Octingentillion', ' Nongentillion', ' Millinillion']
        self.expo = 0
        self.start = start
        self.stop = stop
        self.llist = []
        self.words = words

        self.create_growth()
        self.create_table()

    def create_table(self):
        tp.banner("Normal vs Exponential growth, just {} steps".format(self.stop), 105)
        headers = ['Normal', ' Exponential']

        tp.table(self.llist, headers, '5g', [10, 45], 'round')

    def millify(self, n):
        n = float(n)
        millidx = max(0,min(len(self.millnames)-1,
                            int(math.floor(0 if n == 0 else math.log10(abs(n))/3))))
        zeros = millidx*3
        if zeros > 0:
            return '{:.0f}{} Kilometers ({} Zero\'s)'.format(n / 10**(3 * millidx), self.millnames[millidx], millidx*3)
        else:
            return '{:.0f}{} Kilometers'.format(n / 10 ** (3 * millidx), self.millnames[millidx])

    def create_growth(self):
        for i in range(self.start, self.stop+1):
            nor = "{} meter".format(i)
            if i == 1:
                self.expo = 1
            elif i == 2:
                self.expo = 2
            else:
                self.expo = self.expo * self.expo

            if self.expo >= 1000:
                km = round(self.expo / 1000)
                if self.words:
                    expo_print = "{}".format(self.millify(km))
                else:
                    expo_print = "{:,} kilometers".format(km)
            else:
                expo_print = "{} meter".format(self.expo)

            self.llist.append([nor, expo_print])


if __name__ == '__main__':
    e = Expo_Growth(0, 10, False)
    e = Expo_Growth(0, 10, True)