def big_Ask(patterns):
bindings_lists = []
sign = True
for pattern in patterns:
if bindings_lists != []:
for pair in map(lambda b: (facts_and_rules.instantiate(pattern.full, b), b), bindings_lists):
for fact in KB:
bindings = facts_and_rules.match(pair[0], fact)
if bindings != False:
for key in pair[1]:
bindings[key] = pair[1][key]
bindings_lists.append(bindings)
if sign:
print "This is true\t"
sign = False
print facts_and_rules.statement(facts_and_rules.instantiate(pattern.full, bindings)).pretty()
else:
for fact in KB:
bindings = facts_and_rules.match(pattern, fact)
if bindings != False:
bindings_lists.append(bindings)
if sign:
print "This is true\t"
sign=False
print facts_and_rules.statement(facts_and_rules.instantiate(pattern.full, bindings)).pretty()
if not bindings_lists:
print "None is true:\t"
def ask(patterns):
sets_of_bindings = []
for pattern in patterns:
bindings = []
for fact in facts:
if pattern.predicate == fact.predicate:
# this means we've found a fact that matches our query
binding = facts_and_rules.match(pattern, fact)
if binding != False:
bindings.append(binding)
if len(bindings) >= 1:
sets_of_bindings.append(bindings)
to_return = sets_of_bindings[0]
if len(sets_of_bindings) > 1:
for s in sets_of_bindings[1:]:
to_remove = []
for binding in to_return:
if binding not in s:
to_remove.append(binding)
#ew
for b in to_remove:
to_return.remove(b)
return to_return
def ask(pattern):
for fact in KB:
bindings_lists = []
bindings = facts_and_rules.match(pattern, fact)
if bindings != False:
bindings_lists.append(bindings)
for b in bindings_lists:
print "This is true: \t",
print facts_and_rules.statement(
facts_and_rules.instantiate(pattern.full, b)).pretty()
def Ask(pattern):
list_of_bindings_lists = []
for fact in KB:
bindings = facts_and_rules.match(pattern, fact)
if bindings != False:
list_of_bindings_lists.append(bindings)
if not list_of_bindings_lists:
print "This is False:\t"
for b in list_of_bindings_lists:
print "This is true: \t"
print facts_and_rules.statement(facts_and_rules.instantiate(pattern.full, b)).pretty()
def infer(fact, rule):
# check the first element of the lhs of the rule against our fact
bindings = facts_and_rules.match(rule.lhs[0], fact)
if bindings != False:
# if our rule only contains one argument, add a new fact
if len(rule.lhs) == 1:
if rule.type == "Assert":
new_statement = facts_and_rules.instantiate(
rule.rhs.full, bindings)
# this is a new fact that we can assert
asserted_fact = assert_fact(new_statement)
return asserted_fact
else:
# find the fact that needs to be retracted
fact_to_find = facts_and_rules.statement(
facts_and_rules.instantiate(rule.rhs.full, bindings))
for f in facts:
if facts_and_rules.match(fact_to_find, f) != False:
print "found"
retract(f)
return False
# otherwise, make a new rule with the remaining arguments with bound variables replaced
else:
new_lhs = []
for arg in rule.lhs[1:]:
new_lhs.append(facts_and_rules.instantiate(arg.full, bindings))
new_rhs = facts_and_rules.instantiate(rule.rhs.full, bindings)
if rule.type == "Retract":
new_rhs[0] = '~' + new_rhs[0]
asserted_rule = assert_rule((new_lhs, new_rhs))
return asserted_rule
else:
# if we don't infer anything, return false
return False
def infer_from_fact(fact):
for r in RB:
bindings = facts_and_rules.match(r.lhs[0], fact)
if bindings != False:
if len(r.lhs) == 1:
fact_infered = facts_and_rules.statement(facts_and_rules.instantiate(r.rhs.full, bindings))
fact.add_fact(fact_infered)
dup = False
for f in KB:
dup = dup | facts_and_rules.pattern_match(fact_infered, f)
if not dup:
Assert(fact_infered)
print "fact" + fact.pretty() + "fact inferred" + fact_infered.pretty()
else:
tests = map(lambda x : facts_and_rules.instantiate(x.full, bindings), r.lhs[1:])
rhs = facts_and_rules.instantiate(r.rhs.full, bindings)
new_rule = facts_and_rules.rule(tests, rhs)
fact.add_rule(new_rule)
Assert_Rule(new_rule)
print "Hey there " + r.name + " matches " + fact.pretty()
def infer_from_rule(rule):
for f in KB:
bindings = facts_and_rules.match(rule.lhs[0], f)
if bindings != False:
if len(rule.lhs) == 1:
new_statement = facts_and_rules.statement(
facts_and_rules.instantiate(rule.rhs.full, bindings))
if rule.type == "Assert":
f.add_fact(new_statement)
assert_fact(new_statement)
print "adding inference: " + str(new_statement.full)
elif rule.type == "Retract":
retract(new_statement)
else:
tests = map(
lambda x: facts_and_rules.instantiate(x.full, bindings),
rule.lhs[1:])
rhs = facts_and_rules.instantiate(rule.rhs.full, bindings)
new_rule = facts_and_rules.rule(tests, rhs)
rule.add_rule(new_rule)
assert_rule(new_rule)
def retract(item):
for fact in KB:
if facts_and_rules.match(item, fact) != False:
remove_supports(fact)