MCPP_visitor

(class from pyomo.contrib.mcpp.pyomo_mcpp)

class pyomo.contrib.mcpp.pyomo_mcpp.MCPP_visitor(expression, improved_var_bounds=None)

Bases: StreamBasedExpressionVisitor

Creates an MC++ expression from the corresponding Pyomo expression.

This class walks a pyomo expression tree and builds up the corresponding expression of type McCormick.

Note on memory management: The MCPP_visitor will return a pointer to an MC++ interval object that was dynamically allocated within the C interface. It is the caller’s responsibility to call mcpp_lib.release() on that object to prevent a memory leak

__init__(expression, improved_var_bounds=None)

Methods

__init__(expression[, improved_var_bounds])
acceptChildResult(node, data, child_result, ...)
beforeChild(node, child, child_idx)
exitNode(node, data)
finalizeResult(node_result)
register_num(num)	Registers a new number: Param, Var, or NumericConstant.
register_var(var, lb, ub)	Registers a new variable.
walk_expression()	Walk an expression, calling registered callbacks.
walk_expression_nonrecursive(expr)	Nonrecursively walk an expression, calling registered callbacks.

Attributes

client_methods

Member Documentation

register_num(num)

Registers a new number: Param, Var, or NumericConstant.

register_var(var, lb, ub)

Registers a new variable.

walk_expression()

Walk an expression, calling registered callbacks.

This is the standard interface for running the visitor. It defaults to using an efficient recursive implementation of the visitor, falling back on walk_expression_nonrecursive() if the recursion stack gets too deep.

walk_expression_nonrecursive(expr)

Nonrecursively walk an expression, calling registered callbacks.

This routine is safer than the recursive walkers for deep (or unbalanced) trees. It is, however, slightly slower than the recursive implementations.