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from django.conf import settings
from django.utils.functional import Promise
def smart_unicode(s):
if isinstance(s, Promise):
# The input is the result of a gettext_lazy() call, or similar. It will
# already be encoded in DEFAULT_CHARSET on evaluation and we don't want
# to evaluate it until render time.
# FIXME: This isn't totally consistent, because it eventually returns a
# bytestring rather than a unicode object. It works wherever we use
# smart_unicode() at the moment. Fixing this requires work in the
# i18n internals.
return s
if not isinstance(s, basestring,):
if hasattr(s, '__unicode__'):
s = unicode(s)
else:
s = unicode(str(s), settings.DEFAULT_CHARSET)
elif not isinstance(s, unicode):
s = unicode(s, settings.DEFAULT_CHARSET)
return s
class StrAndUnicode(object):
"""
A class whose __str__ returns its __unicode__ as a bytestring
according to settings.DEFAULT_CHARSET.
Useful as a mix-in.
"""
def __str__(self):
return self.__unicode__().encode(settings.DEFAULT_CHARSET)
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