Integer based, fixed-precision currency calculation.

A set of helper libraries to do currency calculations using only integers, and with currency safety (you can't add two different currencies together).

Represents all values as integer amounts in the minor unit (using ISO 4217 exponent values), and can render numbers to strings or decimals too.

Prevents addition of different currencies, inexact division, and a few other things you really shouldn't be doing with currencies.

Create values using currint.Amount.from_value_and_major if you have Decimals or strings:

>> currint.Amount.from_code_and_major("USD", "1.23")
<Amount USD, 123>

Or using currint.Amount.from_value_and_minor if you already have minor values:

>> currint.Amount.from_code_a
649B
nd_minor("GBP", "4223")
<Amount GBP, 4223>

You can then perform safe mathematics:

amount.apply_factor(2)
amount.divide_and_round(1.34)

And output as decimals of major units if needed:

>> amount.to_major_decimal()
"42.23"

Or directly use the minor values:

>> amount.value
4223
>> amount.currency.code
"GBP"