doctest-blocks

http://docutils.sourceforge.net/docs/ref/rst/restructuredtext.html#doctest-blocks

sample 1

reST sample

Doctest blocks are interactive 
Python sessions. They begin with 
"``>>>``" and end with a blank line.

>>> print "This is a doctest block." 
This is a doctest block.

output sample

Doctest blocks are interactive Python sessions. They begin with “>>>” and end with a blank line.

>>> print "This is a doctest block."
This is a doctest block.