def get_grammar_for_service(short_name):
file_name = '{0}_grammar.txt'.format(short_name)
file_path = path.abspath(path.join(path.dirname(__file__),
'services', file_name))
grammar = parse_grammar_from_file(file_path)
make_chomsky_normal_form(grammar)
grammar_features = generate_grammar_features(grammar)
return grammar_features
def main():
""" Example of generating the language of a grammar. """
grammar = parse_grammar_from_file(
'pal/grammars/services/movie_grammar.txt')
make_chomsky_normal_form(grammar)
try:
language = generate_language_cnf(grammar)
language.sort()
for phrase in language:
print phrase
print 'Size of language:', len(language)
except KeyError as e:
print 'Error: No rule for symbol \'{0}\''.format(e.args[0])
def main():
""" Example of generating the language of a grammar. """
grammar = parse_grammar_from_file(
'pal/grammars/services/movie_grammar.txt')
make_chomsky_normal_form(grammar)
try:
language = generate_language_cnf(grammar)
language.sort()
for phrase in language:
print phrase
print 'Size of language:', len(language)
except KeyError as e:
print 'Error: No rule for symbol \'{0}\''.format(e.args[0])
def main():
grammar = parse_grammar_from_file(sys.argv[1])
make_chomsky_normal_form(grammar)
grammar_features = generate_grammar_features(grammar)
pprint.pprint(grammar)
while True:
string = raw_input().strip().lower()
if not string:
continue
if string[-1] in ['.', '?', '!']:
string = string[:-1]
parse_tree = parse(string, grammar_features)
pprint.pprint(parse_tree)
if parse_tree:
print 'Extract key:',
symbol = raw_input().strip().lower()
print extract(parse_tree, symbol)
def main():
grammar = parse_grammar_from_file(sys.argv[1])
make_chomsky_normal_form(grammar)
grammar_features = generate_grammar_features(grammar)
pprint.pprint(grammar)
while True:
string = raw_input().strip().lower()
if not string:
continue
if string[-1] in ['.', '?', '!']:
string = string[:-1]
parse_tree = parse(string, grammar_features)
pprint.pprint(parse_tree)
if parse_tree:
print 'Extract key:',
symbol = raw_input().strip().lower()
print extract(parse_tree, symbol)
def main():
''' Reads a grammar from a file. Checks that it generates the language.
Converts the grammar to CNF. Checks that the grammar is in CNF, and
that it still generates the language.
'''
print('Loading grammar from file "{0}"...'.format(_GRAMMAR_FILE))
grammar = parse_grammar_from_file(_GRAMMAR_FILE)
with open(_LANGUAGE_FILE) as f:
language = filter(lambda x: not not x,
map(lambda x: x.strip(), f.read().split('\n')))
check_grammar(grammar, language, cnf=False)
print('Converting grammar to CNF...')
make_chomsky_normal_form(grammar)
check_grammar(grammar, language, cnf=True)
check_cnf(grammar)
print('Testing the CYK parser...')
test_parser(language, [], grammar)
#!/usr/bin/env python
# coding: utf-8
#
# Copyright (c) 2015, PAL Team.
# All rights reserved. See LICENSE for details.
import pprint
from pal.grammars.grammars import make_chomsky_normal_form
from pal.grammars.grammars import parse_grammar_from_file
from pal.grammars.parser import parse, generate_grammar_features, extract, search, parent
string = 'how much for two medium thin pizza with extra pineapple but no cheese sauce or mushrooms'
grammar = parse_grammar_from_file('pal/grammars/services/dominos_grammar.txt')
make_chomsky_normal_form(grammar)
grammar_features = generate_grammar_features(grammar)
parse_tree = parse(string, grammar_features)
pprint.pprint(parse_tree)
print 'NOT'
for x in search(parse_tree, 'negation_phrase topping_item'):
print extract(x, x[0]) # flatten
print parent(parse_tree, x)[0]
print '\nWITH'
for x in set(search(parse_tree, 'topping_item')).difference(
set(search(parse_tree, 'negation_phrase topping_item'))):
print extract(x, x[0]) # flatten
print parent(parse_tree, x)[0]
#!/usr/bin/env python
# coding: utf-8
#
# Copyright (c) 2015, PAL Team.
# All rights reserved. See LICENSE for details.
import pprint
from pal.grammars.grammars import make_chomsky_normal_form
from pal.grammars.grammars import parse_grammar_from_file
from pal.grammars.parser import parse, generate_grammar_features, extract, search, parent
string = 'how much for two medium thin pizza with extra pineapple but no cheese sauce or mushrooms'
grammar = parse_grammar_from_file('pal/grammars/services/dominos_grammar.txt')
make_chomsky_normal_form(grammar)
grammar_features = generate_grammar_features(grammar)
parse_tree = parse(string, grammar_features)
pprint.pprint(parse_tree)
print 'NOT'
for x in search(parse_tree, 'negation_phrase topping_item'):
print extract(x, x[0]) # flatten
print parent(parse_tree, x)[0]
print '\nWITH'
for x in set(search(parse_tree, 'topping_item')).difference(set(search(parse_tree, 'negation_phrase topping_item'))):
print extract(x, x[0]) # flatten
print parent(parse_tree, x)[0]