Django Custom Template for GenericSitemap

I have a generic sitemap working. I'm now looking to customize the output.

Im passing in the custom template开发者_JAVA百科_name but it doesn't use it

(r'^sitemap/$', 'django.contrib.sitemaps.views.sitemap',
{'sitemaps':sitemaps, 'template_name':'sitemap.xml'}),

any suggestions?

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for some reason changing sitemap.xml to sitemap.html worked