Source code for woob.capabilities.bank.rate
# Copyright(C) 2010-2016 Romain Bignon
#
# This file is part of woob.
#
# woob is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# woob is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with woob. If not, see <http://www.gnu.org/licenses/>.
from decimal import Decimal
from woob.capabilities.base import BaseObject, Capability, Currency, DecimalField, StringField
from woob.capabilities.date import DateField
__all__ = [
"Rate",
"CapCurrencyRate",
]
[docs]class Rate(BaseObject, Currency):
"""
Currency exchange rate.
"""
currency_from = StringField("The currency to which exchange rates are relative to")
currency_to = StringField("The currency is converted to")
value = DecimalField("Exchange rate")
datetime = DateField("Collection date and time")
def __repr__(self):
return "<{} from={!r} to={!r} value={!r}>".format(
type(self).__name__,
self.currency_from,
self.currency_to,
self.value,
)
[docs] def convert(self, amount):
if isinstance(amount, float):
amount = Decimal(str(amount))
return amount * self.value
[docs]class CapCurrencyRate(Capability):
"""
Capability of bank websites to get currency exchange rates.
"""
[docs] def iter_currencies(self):
"""
Iter available currencies.
:rtype: iter[:class:`Currency`]
"""
raise NotImplementedError()
[docs] def get_rate(self, currency_from, currency_to):
"""
Get exchange rate.
:param currency_from: currency to which exchange rate is relative to
:type currency_from: :class:`Currency`
:param currency_to: currency is converted to
:type currency_to: :class`Currency`
:rtype: :class:`Rate`
"""
raise NotImplementedError()