Cartesius: Simple python coordinate system graphing library

Cartesius is a simple python library for writing coordinate system images. The main reason why I started it was that existing libraries depended on C/C++ modules which are not available on google appengine python SDK. Cartesius has only one dependency -- PIL.

Example usage:

import cartesius.main as cartesius
import cartesius.elements as elements
import cartesius.charts as charts

coordinate_system = cartesius.CoordinateSystem()

# list or tuple of two-element tuples (value, label):
piechart_data = (
    charts.data('abc', 1),
    charts.data('cde', 2),
    charts.data('efg', 4),
    charts.data('ijk', 1),
    charts.data('lmn', 5),
    charts.data('opq', 5),
    charts.data('xyz', 3),
)
piechart = charts.PieChart(data=piechart_data, color=(0, 0, 0))
coordinate_system.add(piechart)

# No need for axes:
coordinate_system.add(elements.Axis(horizontal=True, hide=True))
coordinate_system.add(elements.Axis(vertical=True, hide=True))

The result is:

More examples in the README.