def clone_append(self, predicate_label, producer_pred, bin=False):
'''
Returns a copy of this rule where 'predicate_label'
is appended to the rule.
'''
if not bin:
new_rule = self.clone()
predicate = UnaryPredicate(predicate_label,
self.kb.get_members(predicate_label),
self.kb,
producer_pred=producer_pred)
new_rule.predicates.append(predicate)
new_rule.shared_var[producer_pred.output_var].append(predicate)
else:
new_rule = self.clone()
predicate = BinaryPredicate(predicate_label,
self.kb.get_members(predicate_label),
self.kb,
producer_pred=producer_pred)
new_rule.predicates.append(predicate)
# Introduce new variable
new_rule.shared_var[predicate.output_var] = [predicate]
new_rule.shared_var[predicate.input_var].append(predicate)
new_rule.latest_var = predicate.output_var
new_rule.__refresh_coverage()
new_rule.__refresh_statistics()
return new_rule
def get_root(self):
'''
Root predicate, which covers all examples.
'''
return UnaryPredicate(self.dummy_root,
self.get_full_domain(),
self,
custom_var_name='X')
def clone_swap_with_subclass(self, target_pred, child_pred_label):
'''
Returns a copy of this rule where
'target_pred' is swapped for 'child_pred_label'.
'''
new_rule = self.clone()
# Create the instance of the child pred
producer_pred = target_pred.producer_predicate
var_name = target_pred.input_var
child_pred = UnaryPredicate(child_pred_label,
self.kb.get_members(child_pred_label),
self.kb,
producer_pred=producer_pred,
custom_var_name=var_name)
new_rule._replace_predicate(target_pred, child_pred)
return new_rule
def clone_negate(self, target_pred):
'''
Returns a copy of this rule where 'taget_pred' is negated.
'''
new_rule = self.clone()
# Create the instance of the child pred
producer_pred = target_pred.producer_predicate
var_name = target_pred.input_var
members = target_pred.domain[target_pred.input_var].copy()
members.invert()
neg_pred = UnaryPredicate(target_pred.label,
members,
self.kb,
producer_pred=producer_pred,
custom_var_name=var_name,
negated=True)
new_rule._replace_predicate(target_pred, neg_pred)
return new_rule