either remove the quotes from {% url 'blog.views.add_comment' %} (so it's {% url blog.views.add_comment %}) or {% load url from future %}
Loading from future is the better option, I think.
and for future reference:
Reverse for ''blog.views.add_comment'' with arguments '(1L,)' and keyword arguments '{}' not found.
notice how there's two single quotes there, not a double quote? that's your clue, right there
--
"The whole of Japan is pure invention. There is no such country, there are no such people" --Oscar Wilde
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(='.'=)This is Bunny. Copy and paste bunny
(")_(") to help him gain world domination.