SimPy is a process-based discrete-event simulation language based on standard Python.

It provides the modeller with components of a simulation model. These include processes, for active components like customers, messages, and vehicles, and resources, for passive components that form limited capacity congestion points like servers, checkout counters, and tunnels. It also provides monitor variables to aid in gathering statistics. SimPy comes with extensive plotting capabilities.

This package contains the GUI parts of SimPy.