Adding the |gravatar filter to core_tags

core/templatetags/core_tags.py

@@ -0,0 +1,14 @@
+import urllib
+
+from django import template
+from django.utils.hashcompat import hashlib
+
+register = template.Library()
+
+@register.filter
+def gravatar(email, size=48):
+    url = "http://www.gravatar.com/avatar.php?%s" % urllib.urlencode({
+        'gravatar_id': hashlib.md5(email).hexdigest(), 
+        'size': str(size)
+    })
+    return '<img src="%s" width="%s" height="%s" alt="gravatar" class="gravatar" border="0" />' % (url, size, size)