ams.opt.exprcalc.ExpressionCalc

class ams.opt.exprcalc.ExpressionCalc(name: str | None = None, info: str | None = None, unit: str | None = None, e_str: str | None = None, e_fn: Callable | None = None, model: str | None = None, src: str | None = None)

Class for calculating expressions.

This class is useful for performing post-solve calculations, but it does not participate in the optimization model itself.

Note: ExpressionCalc is not a CVXPY expression and should NOT be referenced in e_str by any other components, including other instances of ExpressionCalc.

Accepts e_fn (callable taking RoutineNS) alongside the legacy e_str form. The codegen emits _exprcalc_<name> callables; the descriptor mutex from OptzBase keeps the two forms exclusive.

__init__(name: str | None = None, info: str | None = None, unit: str | None = None, e_str: str | None = None, e_fn: Callable | None = None, model: str | None = None, src: str | None = None)

Methods

evaluate(*args, **kwargs)
get_all_idxes()	Return all the indexes of this item.
get_idx()
parse(*args, **kwargs)

Attributes

class_name	Return the class name
e	Return the calculated numerical value of the underlying expression.
e_fn	Mutex descriptor for e_str / e_fn on opt elements.
e_str	Mutex descriptor for e_str / e_fn on opt elements.
formulation_source	Where the live CVXPY object for this item came from.
n	Return the number of elements.
shape	Return the shape.
size	Return the size.
v	Return the CVXPY expression value.