Prices: Python price handling for humans

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Money:

frompricesimportMoneya=Money(10, 'USD')
a+=Money(20, 'USD')
a.value# Decimal('30')a=a.quantize()
a.value# Decimal('30.00')a=Money('5.00', 'JPY')
a.quantize()
a.value# Decimal('5')

Taxed money:

frompricesimportMoney, TaxedMoneyp=TaxedMoney(net=Money(20, 'EUR'), gross=Money(30, 'EUR'))
p.net# Money('20', 'EUR')p.gross# Money('30', 'EUR')p.tax# Money('10', 'EUR')p=p.quantize()
p.net# Money('20.00', 'EUR')

Taxed ranges:

frompricesimportMoney, TaxedMoney, TaxedMoneyRangeprice1=TaxedMoney(Money(1, 'USD'), Money(1, 'USD'))
price2=TaxedMoney(Money(10, 'USD'), Money(10, 'USD'))
pr=TaxedMoneyRange(price1, price2)
pr.min_price# TaxedMoney(net=Money('1', 'USD'), gross=Money('1', 'USD'))pr.max_price# TaxedMoney(net=Money('10', 'USD'), gross=Money('10', 'USD'))price3=TaxedMoney(net=Money(5, 'USD'), gross=Money(5, 'USD'))
price3inpr# Truepr=pr.quantize()
pr.min_price.net# Money('1.00', 'USD')

Taxes:

fromdecimalimportDecimalfrompricesimportMoney, TaxedMoney, TaxedMoneyRange, flat_taxp=TaxedMoney(Money('1.99', 'GBP'), Money('1.99', 'GBP'))
p=flat_tax(p, Decimal('0.23'))
p=p.quantize()
p.gross# Money('2.45', 'GBP')

While protecting you from all sorts of mistakes:

frompricesimportMoneyMoney(10, 'USD') <Money(15, 'GBP')
# ValueError: Cannot compare amounts in 'USD' and 'GBP'

frompricesimportMoney, TaxedMoneyprice1=TaxedMoney(Money(5, 'BTC'), Money(5, 'BTC'))
price2=TaxedMoney(Money(7, 'INR'), Money(7, 'INR'))
price1+price2# ValueError: Cannot add amount in 'BTC' to 'INR'