Salabim is a package for discrete event simulation in Python. It follows the methodology of process description as originally demonstrated in Simula and later in Prosim, Must and Tomas.
The process interaction methods are also quite similar to SimPy 2.

The package comprises discrete event simulation, queue handling, resources, statistical sampling and monitoring. On top of that real time animation is built in.

The package comes with a number of sample models.


Salabim runs on

  • CPython
  • PyPy platform
  • Pythonista (iOS)
  • PyDroid3 (Android)

The package is runs only under Python 3.6 and higher.

The following packages are required:

Platform Base functionality Animation Video (mp4, avi) Animated GIF/PNG
Pillow, tkinter opencv, numpy Pillow
Pillow, tkinter N/A Pillow
Pillow N/A Pillow
Pillow, tkinter opencv, numpy Pillow

Several CPython packages, like WinPython support Pillow out of the box. If not, install with:

pip install Pillow

Under Linux, Pillow can be installed with:

sudo apt-get purge python3-pil
sudo apt-get install python3-pil python3-pil.imagetk

For video production, installation of opencv and numpy may be required with

pip install opencv-python
pip install numpy

To add audio to a video (Windows only), installation of ffmpeg is required. Refer to for instructions and download.

Running models under PyPy is highly recommended for production runs, where run time is important. We have found 6 to 7 times faster execution compared to CPython. However, for development, nothing can beat CPython or Pythonista.


The preferred way to install salabim is from PyPI with:

pip install salabim

or to upgrade to a new version:

pip install salabim --upgrade

Alternatively, it is possible to install salabim directly from GitHub with the utility install salabim from, which can be found in the GitHub repository.

You can find the package along with some support files and sample models on From there you can directly download as a zip file and next extract all files. Alternatively the repository can be cloned.

For Pythonista, the easiest way to download salabim is:

  • Tap ‘Open in…’.
  • Tap ‘Run Pythonista Script’.
  • Pick this script and tap the run button
  • Import file
  • Possibly after short delay, there will be a file in the root directory
  • Tap this zip file and Extract files
  • All files are now in a directory called salabim-master
  • Optionally rename this directory to salabim

Salabim itself is provided as one Python script, called You may place that file in any directory where your models reside.

If you want salabim to be available from other directories, without copying the script, either install from PyPI (see above) or run the supplied install file or install salabim from In doing so, you will create (or update) a salabim directory in the site-package directory, which will then contain a copy of the salabim package.


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