hi,

from http://code.google.com/p/pythonxy/wiki/AdditionalPlugins -

Installation notes

Plugins available on this page are not included in Python(x,y) distributions.

Note that each Python(x,y) plugin is compatible with a standard Python installation (i.e. you may install them on top of any Python installation, even without installing Python(x,y)).

- so one need to download it seperately either from python(x,y) or from pyparsing's project site.