inequality

(function from pyomo.core.expr.relational_expr)

pyomo.core.expr.relational_expr.inequality(lower=None, body=None, upper=None, strict=False)[source]

A utility function that can be used to declare inequality and ranged inequality expressions. The expression:

inequality(2, model.x)

is equivalent to the expression:

2 <= model.x

The expression:

inequality(2, model.x, 3)

is equivalent to the expression:

2 <= model.x <= 3

Note

This ranged inequality syntax is deprecated in Pyomo. This function provides a mechanism for expressing ranged inequalities without chained inequalities.

Parameters:

  • lower – an expression defines a lower bound

  • body – an expression defines the body of a ranged constraint

  • upper – an expression defines an upper bound

  • strict (bool) – A boolean value that indicates whether the inequality is strict. Default is False.

Returns:

A relational expression. The expression is an inequality if any of the values lower, body or upper is None. Otherwise, the expression is a ranged inequality.