Ejemplo n.º 1
0
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
Ejemplo n.º 2
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])
Ejemplo n.º 3
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])
Ejemplo n.º 4
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)
Ejemplo n.º 5
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)
Ejemplo n.º 6
0
Archivo: test.py Proyecto: Machyne/pal
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)
Ejemplo n.º 7
0
Archivo: tmp.py Proyecto: Machyne/pal
#!/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]
Ejemplo n.º 8
0
Archivo: tmp.py Proyecto: Machyne/pal
#!/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]