short_currency_format.py

import math
import decimal

def pretty_print(value):
  value = float(value)
  bias = 0
  intdigits = math.floor(math.log10(value))
  divisor = 0
  if intdigits >= 3:
    divisor = intdigits - (intdigits%3)
    # print "Divisor", divisor, "Int digits", intdigits, "Value", value
  value = value/10**divisor
  name = getName(intdigits)
  decValue = decimal.Decimal(value).quantize(decimal.Decimal('.001'), rounding=decimal.ROUND_DOWN)
  return str(decValue) + name

def getName(power):
  if power >= 12:
    return "T"
  elif power >= 9:
    return "B"
  elif power >= 6:
    return "M"
  elif power >= 3:
    return "K"
  else:
    return ""
  


print pretty_print(1.0), pretty_print(1.0) == '1.000'
print pretty_print(100), pretty_print(100) == '100.000'
print pretty_print(10), pretty_print(10) == '10.000'
print pretty_print(1000000), pretty_print(1000000) == '1.000M'
print pretty_print(1000000000), pretty_print(1000000000) == '1.000B'
print pretty_print(10.0000000), pretty_print(10.0000000) == '10.000'
print pretty_print(10.11111), pretty_print(10.11111) == '10.111'
print pretty_print(10.00001), pretty_print(10.00001) == '10.000'
print pretty_print(100000143), pretty_print(100000143) == '100.000M'
print pretty_print(10327492), pretty_print(10327492) == '10.327M'
print pretty_print(103272), pretty_print(103272) == '103.272K'
print pretty_print(103274932), pretty_print(103274932) == '103.274M'
print pretty_print(1032742192), pretty_print(1032742192) == '1.032B'
print pretty_print(1032142192), pretty_print(1032142192) == '1.032B'
print pretty_print(1032192), pretty_print(1032192) == '1.032M'
print pretty_print(10321647193342), pretty_print(10321647193342) == '10.321T'
print pretty_print(24781894), pretty_print(24781894) == '24.781M'
print pretty_print(612481894), pretty_print(612481894) == '612.481M'