Constant

BPTK API Documentation for the Constant class

Keywords

system dynamics, bptk, bptk-py, python, business prototyping

Constant

Constant Constructor

Constant(model, name, function_string=None)

A constant in a SD DSL model

Constant.equation

property equation() Returns the equation as originally set.

• Returns

  The equation, either a SD DSL Element or Operator.

A constant is a converter whose value never changes during a run. Constants are what scenarios override: everything listed in a scenario’s constants block has to be a constant in the model.

Create one through the model: model.constant("advertising_budget").

advertising_budget = model.constant("advertising_budget")
advertising_budget.equation = 100.0

Inherited from Element

Everything else — equation, function_string, plot() and the arrayed-element API — comes from Element, where it is documented once for all element types.