[EXT] admonition exercise ?

_extensions/exercise_admonition.py

@@ -0,0 +1,24 @@
+# -*- coding: utf-8 -*-
+
+"""
+Adds a new "exercise" admonition type
+"""
+
+def setup(app):
+    app.add_directive('exercise', Exercise)
+    app.add_node(exercise, html=(
+        lambda self, node: self.visit_admonition(node, 'exercise'),
+        lambda self, node: self.depart_admonition(node)
+    ), latex=(
+        lambda self, node: self.visit_admonition(node),
+        lambda self, node: self.depart_admonition(node)
+    ))
+
+from docutils import nodes
+from docutils.parsers.rst.directives import admonitions
+class exercise(nodes.Admonition, nodes.Element): pass
+class Exercise(admonitions.BaseAdmonition):
+    node_class = exercise
+
+from sphinx.locale import admonitionlabels
+admonitionlabels['exercise'] = 'Exercise'