815f07d6c1
Also: Allow override of database name and user in tests (important for me as I would have to mess with my PSQL and MySQL database users otherwise) Use dict.items instead of six.iteritems as it sporadically caused RuntimeError: dictionary changed size during iteration in Python 2.6 tests. Fix typo DNS to DSN Adds Python 3.5 to tox.ini Added an .editorconfig Import babel.dates in sqlalchemy_utils.i18n as an exception would be raised when using the latest versions of babel.
109 lines
2.5 KiB
Python
109 lines
2.5 KiB
Python
# -*- coding: utf-8 -*-
|
|
import six
|
|
|
|
from .. import i18n, ImproperlyConfigured
|
|
from ..utils import str_coercible
|
|
|
|
|
|
@str_coercible
|
|
class Currency(object):
|
|
"""
|
|
Currency class wraps a 3-letter currency code. It provides various
|
|
convenience properties and methods.
|
|
|
|
::
|
|
|
|
from babel import Locale
|
|
from sqlalchemy_utils import Currency, i18n
|
|
|
|
|
|
# First lets add a locale getter for testing purposes
|
|
i18n.get_locale = lambda: Locale('en')
|
|
|
|
|
|
Currency('USD').name # US Dollar
|
|
Currency('USD').symbol # $
|
|
|
|
Currency(Currency('USD')).code # 'USD'
|
|
|
|
Currency always validates the given code.
|
|
|
|
::
|
|
|
|
Currency(None) # raises TypeError
|
|
|
|
Currency('UnknownCode') # raises ValueError
|
|
|
|
|
|
Currency supports equality operators.
|
|
|
|
::
|
|
|
|
Currency('USD') == Currency('USD')
|
|
Currency('USD') != Currency('EUR')
|
|
|
|
|
|
Currencies are hashable.
|
|
|
|
|
|
::
|
|
|
|
len(set([Currency('USD'), Currency('USD')])) # 1
|
|
|
|
|
|
"""
|
|
def __init__(self, code):
|
|
if i18n.babel is None:
|
|
raise ImproperlyConfigured(
|
|
"'babel' package is required in order to use Currency class."
|
|
)
|
|
if isinstance(code, Currency):
|
|
self.code = code
|
|
elif isinstance(code, six.string_types):
|
|
self.validate(code)
|
|
self.code = code
|
|
else:
|
|
raise TypeError(
|
|
'First argument given to Currency constructor should be '
|
|
'either an instance of Currency or valid three letter '
|
|
'currency code.'
|
|
)
|
|
|
|
@classmethod
|
|
def validate(self, code):
|
|
try:
|
|
i18n.babel.Locale('en').currencies[code]
|
|
except KeyError:
|
|
raise ValueError("{0}' is not valid currency code.")
|
|
|
|
@property
|
|
def symbol(self):
|
|
return i18n.babel.numbers.get_currency_symbol(
|
|
self.code,
|
|
i18n.get_locale()
|
|
)
|
|
|
|
@property
|
|
def name(self):
|
|
return i18n.get_locale().currencies[self.code]
|
|
|
|
def __eq__(self, other):
|
|
if isinstance(other, Currency):
|
|
return self.code == other.code
|
|
elif isinstance(other, six.string_types):
|
|
return self.code == other
|
|
else:
|
|
return NotImplemented
|
|
|
|
def __ne__(self, other):
|
|
return not (self == other)
|
|
|
|
def __hash__(self):
|
|
return hash(self.code)
|
|
|
|
def __repr__(self):
|
|
return '%s(%r)' % (self.__class__.__name__, self.code)
|
|
|
|
def __unicode__(self):
|
|
return self.code
|