__repr__ with added attributes

gistfile1.py

def attribute_repr(*attributes):
    """
    Example Usage:
    >>> class Foo(object):
    ...     __repr__ = attribute_repr('pk', 'slug')
    <foo.models.Foo at 0x100614c50: pk=1, slug=foo>
    """
    def _repr(self):
        pairs = ('%s=%s' % (attribute, repr(getattr(self, attribute, None))) for attribute in attributes)
        return u'<%s.%s at 0x%x: %s>' % (self.__class__.__module__, self.__class__.__name__,
            id(self), ', '.join(pairs))
    return _repr