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-rw-r--r--mediagoblin/_compat.py7
1 files changed, 5 insertions, 2 deletions
diff --git a/mediagoblin/_compat.py b/mediagoblin/_compat.py
index c38e0727..ab5dbcf6 100644
--- a/mediagoblin/_compat.py
+++ b/mediagoblin/_compat.py
@@ -1,5 +1,3 @@
-import sys
-
from six import PY3, iteritems
from mediagoblin import mg_globals
@@ -17,8 +15,13 @@ else:
ungettext = mg_globals.thread_scope.translations.ungettext
+# taken from https://github.com/django/django/blob/master/django/utils/encoding.py
def py2_unicode(klass):
if not PY3:
+ if '__str__' not in klass.__dict__:
+ raise ValueError("@py2_unicode cannot be applied "
+ "to %s because it doesn't define __str__()." %
+ klass.__name__)
klass.__unicode__ = klass.__str__
klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
return klass