How to install matplotlib and pyparsing correctly on OSX-Lion?

Question

I am trying to install the Contour plugin in QGIS 2.0.1 (I'm running OSX-Lion) and I have installed NumPy and Matplotlib from kyngchaos however when I go to install the plugin I get the following error:

The Plugin is broken. Python said: matplotlib requires pyparsing

Did I misinstall matplotlib or do I simply need to find a copy of pyparsing, and if so, where is a good place to get it?

UPDATE: I downloaded pyparsing from pyparsing.wikispaces.com and have been following the guidelines for installation. The README tell me to "Do the usual: python setup.py install" but the online instructions say to use "easy_install pyparsing". I am not sure what I am really supposed to do with this information. I have tried running the "Setup.py" file but it lacks a command but I am not sure where to add the command.

Thanks DF

Answer 1

QGIS use the Apple Python installed by default on your system and pyparsing is a Python module.

And even if it is not a GIS question, to install a Python module (if you have not pip or easy_install):

1. download the module and unzip it
2. open the Terminal.app and cd to the folder of the unzipped module

3. type:

   python setup.py install

and pyparsing is installed in /Library/Python/2.7/site-packages

Answer 2

I had the same problem. I solved it installing pyparsing by going to Terminal and typing: sudo /usr/bin/easy_install pyparsing, which uses the easy_install that comes with the Apple-supplied Python version that QGIS is using.