base-convert.py

#!/usr/bin/env python3

import string, math, sys

ibase = '0123456789'
ival = sys.argv[1]

obase = '0123456789abcdef'
obase = string.digits + string.ascii_lowercase
obase = string.printable[:94].replace(',', '')

def ceilup(n):
    if int(n) == round(n) == math.ceil(n):
        return n + 1

    return math.ceil(n)

original_ival = ival
obase_dec = len(obase)

val = 0
while ival != '':
    val += ibase.index(ival[0]) * (len(ibase) ** (len(ival) - 1))
    ival = ival[1:]

print('{} in base {} converts to {} in base 10'.format(original_ival, len(ibase), val))

ostr = ''

for pos in range(int(ceilup(math.log(val)/math.log(len(obase)))), 0, -1):
    tmp_dec = math.floor(val / (len(obase) ** (pos - 1)))
    dec_worth = tmp_dec * (len(obase) ** (pos - 1))
    print('tmp_dec={} dec_worth={} pos={} val={}'.format(tmp_dec, dec_worth, pos, val))
    tmp_obase = obase[tmp_dec]
    val -= dec_worth
    ostr += tmp_obase

print(ostr)