A simplified World Model for the Course Kontinuierliche Simulation, free after J. W. Forrester's Model from 1971.

The package includes the model.py module which serves for the mathematical stuff and some additional modules. qt_gui.py includes the most advanced gui heavily utilizing pyqtgraph and pyqt and a second gui implemetation in kivy which hasn't so many feautures as the qt one, but is also nice and seems somehow more fun to program with. (This is anyways my first gui programming so it was kind of a test.)

I suggest to setup a virtualenvironment, then one can do:

pip install -e git+https://github.com/mortbauer/limitsofgrowth

One also needs quite many requirements, so also run:

pip install -r requirements.txt

Depending on which gui version one wanna use you will also need:

pip install -r requirements_kivy.txt

or:

pip install -r requirements_qt.txt

To use the gui just run (in the activated virtualenv):

limitsofgrowth-qt

for the qt version, or:

limitsofgrowth-kivy

for the kivy version.

One can also just use the mathematic model without the gui. You basically do:

from limitsofgrowth.model import WorldSimple

w = WorldSimple()

To calculate the states now you can run:

x = w.x_odeint(w.initial)

which will use the initial parameters for simulation.