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Money

A wrapper of py-moneyed is used by Django project.

pip install py-moneyed

The py-moneyed package in Python offers several advantages over using the Decimal class
for representing monetary values:

  1. Currency and Money Classes: py-moneyed provides Money and Currency classes, which are more useful for
    representing instances of money. These classes offer a higher level of abstraction than the Decimal class,
    making it easier to handle money-related operations.
  2. Avoids Floating Point Issues: The Decimal class is a better choice than floating point numbers for monetary
    calculations due to precision issues with floats⁴. However, py-moneyed takes this a step further by providing
    dedicated classes for money and currency¹.
  3. Supports Exact Calculations: py-moneyed allows for exact calculations with monetary values, avoiding rounding
    errors that can occur with chained calculations.
  4. Ease of Use: Money objects in py-moneyed can be used as if they were numbers, providing a
    straightforward and intuitive interface.

In summary, py-moneyed offers a more robust and user-friendly way to handle monetary values in Python
compared to the Decimal class.

List currencies

from moneyed import list_all_currencies

currencies = list_all_currencies()
print(currencies)
print(len(currencies))

Money type

from moneyed import Money


m1 = Money(amount='35.45', currency='EUR')

print(m1.amount)
print(m1.currency)
print(m1.get_amount_in_sub_unit())

Forint

from moneyed import HUF

print(HUF.get_name(locale='hu_HU'))
print(HUF.get_name(locale='sk_SK'))

print(HUF.code)
print(HUF.name)

Sum Money values

from moneyed import Money, USD

cur = USD

values = (Money('19.99', cur), Money('25.00', cur),
          Money('14.32', cur), Money('6.00', cur))

msum = sum(values)
print(msum)

The get_country_name function

from moneyed import get_country_name
from moneyed import ZMW

print(ZMW.name)


print(get_country_name('ZM', 'en'))
print(get_country_name('ZM', 'ru'))
print(get_country_name('ZM', 'uk'))
print(get_country_name('ZM', 'fr'))
from moneyed import get_country_name
from moneyed import SKK

print(SKK.name)
print(SKK.code)
print(SKK.numeric)
print(SKK.sub_unit)
print(SKK.countries)

print(get_country_name('SK', 'en'))
print(get_country_name('SK', 'ru'))
print(get_country_name('SK', 'uk'))
print(get_country_name('SK', 'fr'))

Precision

from moneyed import Money


msum = Money(amount='0', currency='EUR')
m = Money(amount='1.46', currency='EUR')

for _ in range(100_000):
    msum += m

print(msum)
print(type(msum))

print('------------------------------')

msum = 0
m = 1.46

for _ in range(100_000):
    msum += m

print(msum)
print(type(msum))

Format

from moneyed import Money
from moneyed.l10n import format_money

m = Money(25.36, 'CNY')

print(format_money(m, locale='en_US'))
print(format_money(m, locale='sk_SK'))
print(format_money(m, locale='ru_RU'))
print(format_money(m, locale='cs_CZ'))
print(format_money(m, locale='fr_FR'))
print(format_money(m, locale='zh_CN'))

Conversion rates

import requests, json
from moneyed import Money


amount_eur = 100
cfrom = 'EUR'
cto = 'USD'

url = f'https://api.frankfurter.app/latest?amount={amount_eur}&from={cfrom}&to={cto}'

resp = requests.get(url)
content = resp.content.decode('utf8')

content_json = json.loads(content)
amount_usd = content_json['rates'][cto]
dt = content_json['date']

m_eur = Money(amount_eur, cfrom)
m_usd = Money(amount_usd, cto)

print(f'{m_eur} is {m_usd} on {dt}')