# -*- coding: utf-8 -*-
# This file is part of Shuup.
#
# Copyright (c) 2012-2017, Shoop Commerce Ltd. All rights reserved.
#
# This source code is licensed under the OSL-3.0 license found in the
# LICENSE file in the root directory of this source tree.
from __future__ import unicode_literals
import decimal
from collections import defaultdict
import babel.core
_cache = None
_default = None
[docs]def get_precision(currency):
"""
Get precisision for given currency from Babel.
:type currency: str
:param currency: Currency code as 3-letter string (ISO-4217)
:rtype: decimal.Decimal
:return: Precision value for given currency code
"""
global _cache
if _cache is None:
_cache = _generate_cache()
return _cache[currency]
def _generate_cache():
currency_fractions = babel.core.get_global('currency_fractions')
values = {
currency: decimal.Decimal('0.1') ** data[0]
for (currency, data) in currency_fractions.items()
}
default = values.pop('DEFAULT')
cache = defaultdict(lambda: default)
cache.update(values)
return cache