def test_transformShouldNotChange(self):
g = Grammar(nonterminals=[S, A,B,C],
rules=[Rules])
ContextFree.transform_to_chomsky_normal_form(g)
self.assertEqual(g.rules_count(), 1)
self.assertEqual(len(g.rules()), 1)
self.assertEqual(g.rules()[0], Rules)
def test_transformShouldNotChange(self):
g = Grammar(terminals=['a', 'b'],
nonterminals=[S, A, B],
rules=[Rules])
ContextFree.transform_to_chomsky_normal_form(g)
self.assertEqual(g.rules_count(), 7)
self.assertEqual(len(g.rules()), 7)
self.assertEqual(g.nonterms_count(), 3)
self.assertEqual(len(g.nonterms()), 3)
self.assertTrue(g.have_rule(Rules))
def setUp(self):
self.g = Grammar(terminals=[My],
nonterminals=[S],
rules=[R],
start_symbol=S)
ContextFree.remove_useless_symbols(self.g, transform_grammar=True)
ContextFree.remove_rules_with_epsilon(self.g, transform_grammar=True)
ContextFree.remove_unit_rules(self.g, transform_grammar=True)
ContextFree.remove_useless_symbols(self.g, transform_grammar=True)
ContextFree.transform_to_chomsky_normal_form(self.g, transform_grammar=True)
def test_transformShouldChange(self):
g = Grammar(nonterminals=[S, A, B, C],
rules=[Rules])
ContextFree.transform_to_chomsky_normal_form(g, transform_grammar=True)
self.assertEqual(g.rules_count(), 2)
self.assertEqual(len(g.rules()), 2)
fromS = list(filter(lambda r: r.fromSymbol == S, g.rules()))[0]
self.assertEqual(fromS.right[0], A)
temp = fromS.right[1]
fromTemp = list(filter(lambda r: r.right == [B, C], g.rules()))[0]
self.assertEqual(temp, fromTemp.fromSymbol)
self.assertEqual(g.nonterms_count(), 5)
self.assertEqual(len(g.nonterms()), 5)
def test_transformShouldChange(self):
g = Grammar(terminals=['a', 'b'],
nonterminals=[S, A, B],
rules=[Rules])
ContextFree.transform_to_chomsky_normal_form(g, transform_grammar=True)
self.assertEqual(g.rules_count(), 13)
self.assertEqual(len(g.rules()), 13)
self.assertEqual(g.nonterms_count(), 9)
self.assertEqual(len(g.nonterms()), 9)
# Old
class AaRule(Rule): rule=([A], ['a'])
self.assertTrue(g.have_rule(AaRule))
class BAARule(Rule): rule=([B], [A, A])
self.assertTrue(g.have_rule(BAARule))
# New
StoaB = list(filter(lambda r: r.fromSymbol == S and r.right[1] == B, g.rules()))[0]
special_a = StoaB.right[0]
StobA = list(filter(lambda r: r.fromSymbol == S and r.right[1] == A, g.rules()))[0]
special_b = StobA.right[0]
class StoaBRule(Rule): rule=([S], [special_a, B])
self.assertTrue(g.have_rule(StoaBRule))
class StobARule(Rule): rule=([S], [special_b, A])
self.assertTrue(g.have_rule(StobARule))
class AtoaSRule(Rule): rule=([A], [special_a, S])
self.assertTrue(g.have_rule(AtoaSRule))
AtobAA = list(filter(lambda r: r.fromSymbol == A and r.right[0] == special_b, g.rules()))[0]
new_AA = AtobAA.right[1]
class AtoabAARule(Rule): rule=([A], [special_b, new_AA])
self.assertTrue(g.have_rule(AtoabAARule))
BtoaBBaA = list(filter(lambda r: r.fromSymbol == B and r.right[0] == special_a, g.rules()))[0]
new_BBaA = BtoaBBaA.right[1]
class BtoaBBaA(Rule): rule=([B], [special_a, new_BBaA])
self.assertTrue(g.have_rule(BtoaBBaA))
class AAtoAARule(Rule): rule=([new_AA], [A, A])
self.assertTrue(g.have_rule(AAtoAARule))
BBaAtoBBaA = list(filter(lambda r: r.fromSymbol == new_BBaA, g.rules()))[0]
self.assertEqual(BBaAtoBBaA.right[0], B)
new_BaA = BBaAtoBBaA.right[1]
BaAtoBaA = list(filter(lambda r: r.fromSymbol == new_BaA, g.rules()))[0]
self.assertEqual(BaAtoBaA.right[0], B)
new_aA = BaAtoBaA.right[1]
class aAtoaARule(Rule): rule = ([new_aA], [special_a, A])
self.assertTrue(g.have_rule(aAtoaARule))
# Terminals
class atoaRule(Rule): rule=([special_a], ['a'])
self.assertTrue(g.have_rule(atoaRule))
class btobRule(Rule): rule=([special_b], ['b'])
self.assertTrue(g.have_rule(btobRule))
def test_transformShouldChange(self):
g = Grammar(terminals=[0, 1], nonterminals=[S], rules=[Rules])
ContextFree.transform_to_chomsky_normal_form(g, transform_grammar=True)
self.assertEqual(g.rules_count(), 3)
self.assertEqual(len(g.rules()), 3)
fromS = list(filter(lambda r: r.fromSymbol == S, g.rules()))[0]
to0 = fromS.right[0]
to1 = fromS.right[1]
self.assertTrue(issubclass(to0, ContextFree.ChomskyTermNonterminal))
self.assertTrue(issubclass(to1, ContextFree.ChomskyTermNonterminal))
to0R = list(filter(lambda r: r.right == [0], g.rules()))[0]
to1R = list(filter(lambda r: r.right == [1], g.rules()))[0]
self.assertEqual(to0R.fromSymbol, to0)
self.assertEqual(to1R.fromSymbol, to1)
self.assertEqual(g.nonterms_count(), 3)
self.assertEqual(len(g.nonterms()), 3)
def test_simpleTestOverUnitRule(self):
g = Grammar(terminals=[0, 1],
nonterminals=[S, A, B, C, D],
rules=[RuleS1AB, RuleB0, RuleACD, RuleCD, RuleDEps],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(ContextFree.remove_unit_rules(ContextFree.remove_rules_with_epsilon(g)))
pars = cyk(gr, [1, 0])
s = InverseContextFree.epsilon_rules_restore(InverseContextFree.unit_rules_restore(InverseContextFree.transform_from_chomsky_normal_form(pars)))
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleS1AB)
self.assertIsInstance(s.to_rule.to_symbols[0], Terminal)
self.assertEqual(s.to_rule.to_symbols[0].s, 1)
b = s.to_rule.to_symbols[2]
self.assertIsInstance(b, B)
self.assertIsInstance(b.to_rule, RuleB0)
self.assertIsInstance(b.to_rule.to_symbols[0], Terminal)
self.assertEqual(b.to_rule.to_symbols[0].s, 0)
a = s.to_rule.to_symbols[1]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleACD)
d = a.to_rule.to_symbols[1]
self.assertIsInstance(d, D)
self.assertIsInstance(d.to_rule, RuleDEps)
self.assertIs(d.to_rule.to_symbols[0].s, EPS)
c = a.to_rule.to_symbols[0]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleCD)
d = c.to_rule.to_symbols[0]
self.assertIsInstance(d, D)
self.assertIsInstance(d.to_rule, RuleDEps)
self.assertIs(d.to_rule.to_symbols[0].s, EPS)
def test_repeatOfC(self):
g = Grammar(terminals=[0, 1, 2, 3],
nonterminals=[S, A, B, C, D],
rules=[
RuleSA, RuleSB, RuleAC, RuleA0A, RuleBD, RuleB2B,
RuleB3S, RuleC1C, RuleC0, RuleD3D, RuleD2
],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(
ContextFree.remove_unit_rules(g))
pars = cyk(gr, [1, 1, 0])
s = InverseContextFree.unit_rules_restore(
InverseContextFree.transform_from_chomsky_normal_form(pars))
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleSA)
a = s.to_rule.to_symbols[0]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleAC)
c = a.to_rule.to_symbols[0]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC1C)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 1)
c = c.to_rule.to_symbols[1]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC1C)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 1)
c = c.to_rule.to_symbols[1]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC0)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 0)
def test_transform(self):
g = Grammar(terminals=[0, 1, 2],
nonterminals=[S, A, B, C],
rules=[RuleSABC, RuleA0, RuleB1, RuleC2],
start_symbol=S)
com = ContextFree.transform_to_chomsky_normal_form(g)
pars = cyk(com, [0, 1, 2])
trans = InverseContextFree.transform_from_chomsky_normal_form(pars)
self.assertIsInstance(trans, S)
self.assertIsInstance(trans.to_rule, RuleSABC)
a = trans.to_rule.to_symbols[0]
b = trans.to_rule.to_symbols[1]
c = trans.to_rule.to_symbols[2]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleA0)
self.assertIsInstance(a.to_rule.to_symbols[0], Terminal)
self.assertEqual(a.to_rule.to_symbols[0].s, 0)
self.assertIsInstance(b, B)
self.assertIsInstance(b.to_rule, RuleB1)
self.assertIsInstance(b.to_rule.to_symbols[0], Terminal)
self.assertEqual(b.to_rule.to_symbols[0].s, 1)
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC2)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 2)
def test_transform(self):
g = Grammar(
terminals=[0, 1, 2, 3],
nonterminals=[S, A, B, C],
rules=[RuleS, RuleA, RuleB, RuleS0, RuleA1, RuleB2, RuleC3],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(g)
pars = cyk(gr, [1, 3, 1, 2, 3, 1, 3])
trans = InverseContextFree.transform_from_chomsky_normal_form(pars)
self.assertIsInstance(trans, S)
self.assertIsInstance(trans.to_rule, RuleS)
a = trans.to_rule.to_symbols[0]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleA1)
self.assertIsInstance(a.to_rule.to_symbols[0], Terminal)
self.assertEqual(a.to_rule.to_symbols[0].s, 1)
b = trans.to_rule.to_symbols[1]
self.assertIsInstance(b, B)
self.assertIsInstance(b.to_rule, RuleB)
c = b.to_rule.to_symbols[0]
self.assertIsInstance(c, C)
self.assertIsInstance(c.to_rule, RuleC3)
self.assertIsInstance(c.to_rule.to_symbols[0], Terminal)
self.assertEqual(c.to_rule.to_symbols[0].s, 3)
s = b.to_rule.to_symbols[1]
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleS)
self.assertIsInstance(s.to_rule.to_symbols[0], A)
self.assertIsInstance(s.to_rule.to_symbols[0].to_rule, RuleA1)
self.assertIsInstance(s.to_rule.to_symbols[0].to_rule.to_symbols[0],
Terminal)
self.assertEqual(s.to_rule.to_symbols[0].to_rule.to_symbols[0].s, 1)
self.assertIsInstance(s.to_rule.to_symbols[1], B)
self.assertIsInstance(s.to_rule.to_symbols[1].to_rule, RuleB2)
self.assertIsInstance(s.to_rule.to_symbols[1].to_rule.to_symbols[0],
Terminal)
self.assertEqual(s.to_rule.to_symbols[1].to_rule.to_symbols[0].s, 2)
self.assertIsInstance(s.to_rule.to_symbols[2], C)
self.assertIsInstance(s.to_rule.to_symbols[2].to_rule, RuleC3)
self.assertIsInstance(s.to_rule.to_symbols[2].to_rule.to_symbols[0],
Terminal)
self.assertEqual(s.to_rule.to_symbols[2].to_rule.to_symbols[0].s, 3)
self.assertIsInstance(b.to_rule.to_symbols[2], A)
self.assertIsInstance(b.to_rule.to_symbols[2].to_rule, RuleA1)
self.assertIsInstance(b.to_rule.to_symbols[2].to_rule.to_symbols[0],
Terminal)
self.assertEqual(b.to_rule.to_symbols[2].to_rule.to_symbols[0].s, 1)
self.assertIsInstance(pars.to_rule.to_symbols[2], C)
self.assertIsInstance(pars.to_rule.to_symbols[2].to_rule, RuleC3)
self.assertIsInstance(pars.to_rule.to_symbols[2].to_rule.to_symbols[0],
Terminal)
self.assertEqual(pars.to_rule.to_symbols[2].to_rule.to_symbols[0].s, 3)
def test_transformShouldChange(self):
g = Grammar(nonterminals=[S, A, B, C], rules=[Rules])
ContextFree.transform_to_chomsky_normal_form(g, transform_grammar=True)
self.assertEqual(g.rules_count(), 6)
self.assertEqual(len(g.rules()), 6)
fromS = list(filter(lambda r: r.fromSymbol == S, g.rules()))[0]
self.assertEqual(fromS.right[0], A)
tempS = fromS.right[1]
fromSTemp = list(filter(lambda r: r.right == [B, C], g.rules()))[0]
self.assertEqual(tempS, fromSTemp.fromSymbol)
fromA = list(filter(lambda r: r.fromSymbol == A, g.rules()))[0]
self.assertEqual(fromA.right[0], B)
tempA = fromA.right[1]
fromATemp = list(filter(lambda r: r.right == [C, S], g.rules()))[0]
self.assertEqual(tempA, fromATemp.fromSymbol)
fromB = list(filter(lambda r: r.fromSymbol == B, g.rules()))[0]
self.assertEqual(fromB.right[0], C)
tempB = fromB.right[1]
fromBTemp = list(filter(lambda r: r.right == [S, A], g.rules()))[0]
self.assertEqual(tempB, fromBTemp.fromSymbol)
self.assertEqual(g.nonterms_count(), 7)
self.assertEqual(len(g.nonterms()), 7)
def test_transform(self):
g = Grammar(terminals=[0, 1],
nonterminals=[S],
rules=[Rules],
start_symbol=S)
tr = ContextFree.transform_to_chomsky_normal_form(g)
pars = cyk(tr, [0, 1])
rest = InverseContextFree.transform_from_chomsky_normal_form(pars)
self.assertIsInstance(rest, S)
self.assertIsInstance(rest.to_rule, Rules)
self.assertIsInstance(rest.to_rule.to_symbols[0], Terminal)
self.assertIsInstance(rest.to_rule.to_symbols[1], Terminal)
self.assertEqual(rest.to_rule.to_symbols[0].s, 0)
self.assertEqual(rest.to_rule.to_symbols[1].s, 1)
def test_simpleTestOverUnitRule(self):
g = Grammar(
terminals=[0, 1, 2, 3],
nonterminals=[S, A, B, C],
rules=[RuleS0A, RuleAB, RuleAEps, RuleBEps, RuleB1C, RuleC11],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(
ContextFree.remove_unit_rules(
ContextFree.remove_rules_with_epsilon(g)))
pars = cyk(gr, [0])
s = InverseContextFree.epsilon_rules_restore(
InverseContextFree.unit_rules_restore(
InverseContextFree.transform_from_chomsky_normal_form(pars)))
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleS0A)
self.assertIsInstance(s.to_rule.to_symbols[0], Terminal)
self.assertEqual(s.to_rule.to_symbols[0].s, 0)
a = s.to_rule.to_symbols[1]
self.assertIsInstance(a, A)
self.assertIsInstance(a.to_rule, RuleAEps)
self.assertIs(a.to_rule.to_symbols[0].s, EPS)
def test_directTo2(self):
g = Grammar(terminals=[0, 1, 2, 3],
nonterminals=[S, A, B, C, D],
rules=[
RuleSA, RuleSB, RuleAC, RuleA0A, RuleA1S, RuleBD,
RuleB2B, RuleB3S, RuleC1C, RuleC0, RuleD3D, RuleD2
],
start_symbol=S)
gr = ContextFree.transform_to_chomsky_normal_form(
ContextFree.remove_unit_rules(g))
pars = cyk(gr, [2])
s = InverseContextFree.unit_rules_restore(
InverseContextFree.transform_from_chomsky_normal_form(pars))
self.assertIsInstance(s, S)
self.assertIsInstance(s.to_rule, RuleSB)
b = s.to_rule.to_symbols[0]
self.assertIsInstance(b, B)
self.assertIsInstance(b.to_rule, RuleBD)
d = b.to_rule.to_symbols[0]
self.assertIsInstance(d, D)
self.assertIsInstance(d.to_rule, RuleD2)
self.assertIsInstance(d.to_rule.to_symbols[0], Terminal)
self.assertEqual(d.to_rule.to_symbols[0].s, 2)
