idp_engine.Problem¶
Class to represent a collection of theory and structure blocks.
-
class
idp_engine.Problem.
Problem
(*blocks)[source]¶ A collection of theory and structure blocks.
-
declarations
¶ the list of type and symbol declarations
- Type
dict[str, Type]
-
constraints
¶ a set of assertions.
- Type
-
assignments
¶ the set of assignments. The assignments are updated by the different steps of the problem resolution.
- Type
-
clark
¶ A mapping of defined symbol to the rule that defines it.
- Type
dict[SymbolDeclaration, Rule]
-
def_constraints
¶ A mapping of defined symbol to the whole-domain constraint equivalent to its definition.
- Type
dict[SymbolDeclaration], Expression
-
interpretations
¶ A mapping of enumerated symbols to their interpretation.
- Type
dict[string, SymbolInterpretation]
-
goals
¶ A set of goal symbols
- Type
dict[string, SymbolDeclaration]
-
_formula
¶ the logic formula that represents the problem.
- Type
Expression, optional
-
questions
¶ the set of questions in the problem. Questions include predicates and functions applied to arguments, comparisons, and variable-free quantified expressions.
- Type
-
co_constraints
¶ the set of co_constraints in the problem.
- Type
-
expand
(max=10, complete=False, extended=False)[source]¶ output: a list of Assignments, ending with a string
-
symbolic_propagate
(tag=<Status.UNIVERSAL: 4>)[source]¶ determine the immediate consequences of the constraints
-
propagate
(tag=<Status.CONSEQUENCE: 6>, extended=False)[source]¶ determine all the consequences of the constraints
-
decision_table
(goal_string='', timeout=20, max_rows=50, first_hit=True, verify=False)[source]¶ returns a decision table for goal_string, given self.
- Parameters
goal_string (str, optional) – the last column of the table.
timeout (int, optional) – maximum duration in seconds. Defaults to 20.
max_rows (int, optional) – maximum number of rows. Defaults to 50.
first_hit (bool, optional) – requested hit-policy. Defaults to True.
verify (bool, optional) – request verification of table completeness. Defaults to False
- Returns
the non-empty cells of the decision table
- Return type
list(list(Assignment))
-