:source:`Tools/demo/redemo.py`, a demonstration program included with the
Python distribution. It allows you to enter REs and strings, and displays
whether the RE matches or fails. :file:`redemo.py` can be quite useful when
-trying to debug a complicated RE. Phil Schwartz's `Kodos
-<http://kodos.sourceforge.net/>`_ is also an interactive tool for developing and
-testing RE patterns.
+trying to debug a complicated RE.
This HOWTO uses the standard Python interpreter for its examples. First, run the
Python interpreter, import the :mod:`re` module, and compile a RE::