# idp_solver.Assignments¶

Classes to store assignments of values to questions

class idp_solver.Assignments.Status(value)[source]

Describes how the value of a question was obtained

class idp_solver.Assignments.Assignment(sentence: idp_solver.Expression.Expression, value: Optional[idp_solver.Expression.Expression], status: Optional[idp_solver.Assignments.Status], relevant: Optional[bool] = False)[source]

Represent the assignment of a value to a question. Questions can be:

• predicates and functions applied to arguments,

• comparisons,

• outermost quantified expressions

A value is a rigid term.

An assignment also has a reference to the symbol under which it should be displayed.

sentence

the question to be assigned a value

Type

Expression

value

a rigid term

Type

Expression, optional

status

qualifies how the value was obtained

Type

Status, optional

relevant

states whether the sentence is relevant

Type

bool, optional

symbol_decl

declaration of the symbol under which

Type

SymbolDeclaration

it should be displayed.
same_as(other: idp_solver.Assignments.Assignment) → bool[source]

returns True if self has the same sentence and truth value as other.

Parameters

other (Assignment) – an assignment

Returns

True if self has the same sentence and truth value as other.

Return type

bool

negate()[source]

returns an Assignment for the same sentence, but an opposite truth value.

Raises

AssertionError – Cannot negate a non-boolean assignment

Returns

returns an Assignment for the same sentence, but an opposite truth value.

Return type

[type]

as_set_condition()[source]

returns an equivalent set condition, or None

Returns

meaning “appSymb is (not) in enumeration”

Return type

Tuple[Optional[AppliedSymbol], Optional[bool], Optional[Enumeration]]

unset()[source]

Unsets the value of an assignment.

Returns

None

class idp_solver.Assignments.Assignments(*arg, **kw)[source]

Contains a set of Assignment

copy() → a shallow copy of D[source]