def __init__(self, **kwargs):
        View.__init__(self, **kwargs)

        # Allow this view to easily switch between feed formats.
        format = kwargs.get('format', self.format)
        try:
            self.feed_type = _FEED_FORMATS[format]
        except __HOLE__:
            raise ValueError("Unsupported feed format: {0}. Supported are: {1}".format(
                self.format, ', '.join(sorted(_FEED_FORMATS.iterkeys()))
            ))
dataset/ETHPy150Open edoburu/django-fluent-blogs/fluent_blogs/views/feeds.py/FeedView.__init__