1261 lines
48 KiB
Python
1261 lines
48 KiB
Python
# Natural Language Toolkit: Interface to Boxer
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# <http://svn.ask.it.usyd.edu.au/trac/candc/wiki/boxer>
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#
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# Author: Dan Garrette <dhgarrette@gmail.com>
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#
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# Copyright (C) 2001-2018 NLTK Project
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# URL: <http://nltk.org/>
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# For license information, see LICENSE.TXT
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"""
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An interface to Boxer.
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This interface relies on the latest version of the development (subversion) version of
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C&C and Boxer.
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Usage:
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Set the environment variable CANDC to the bin directory of your CandC installation.
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The models directory should be in the CandC root directory.
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For example:
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/path/to/candc/
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bin/
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candc
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boxer
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models/
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boxer/
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"""
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from __future__ import print_function, unicode_literals
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import os
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import re
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import operator
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import subprocess
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from optparse import OptionParser
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import tempfile
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from functools import reduce
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from nltk.internals import find_binary
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from nltk.sem.logic import (ExpectedMoreTokensException, LogicalExpressionException,
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UnexpectedTokenException, Variable)
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from nltk.sem.drt import (DRS, DrtApplicationExpression, DrtEqualityExpression,
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DrtNegatedExpression, DrtOrExpression, DrtParser,
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DrtProposition, DrtTokens, DrtVariableExpression)
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from nltk.compat import python_2_unicode_compatible
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class Boxer(object):
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"""
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This class is an interface to Johan Bos's program Boxer, a wide-coverage
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semantic parser that produces Discourse Representation Structures (DRSs).
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"""
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def __init__(self, boxer_drs_interpreter=None, elimeq=False, bin_dir=None, verbose=False, resolve=True):
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"""
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:param boxer_drs_interpreter: A class that converts from the
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``AbstractBoxerDrs`` object hierarchy to a different object. The
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default is ``NltkDrtBoxerDrsInterpreter``, which converts to the NLTK
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DRT hierarchy.
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:param elimeq: When set to true, Boxer removes all equalities from the
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DRSs and discourse referents standing in the equality relation are
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unified, but only if this can be done in a meaning-preserving manner.
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:param resolve: When set to true, Boxer will resolve all anaphoric DRSs and perform merge-reduction.
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Resolution follows Van der Sandt's theory of binding and accommodation.
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"""
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if boxer_drs_interpreter is None:
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boxer_drs_interpreter = NltkDrtBoxerDrsInterpreter()
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self._boxer_drs_interpreter = boxer_drs_interpreter
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self._resolve = resolve
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self._elimeq = elimeq
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self.set_bin_dir(bin_dir, verbose)
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def set_bin_dir(self, bin_dir, verbose=False):
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self._candc_bin = self._find_binary('candc', bin_dir, verbose)
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self._candc_models_path = os.path.normpath(os.path.join(self._candc_bin[:-5], '../models'))
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self._boxer_bin = self._find_binary('boxer', bin_dir, verbose)
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def interpret(self, input, discourse_id=None, question=False, verbose=False):
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"""
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Use Boxer to give a first order representation.
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:param input: str Input sentence to parse
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:param occur_index: bool Should predicates be occurrence indexed?
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:param discourse_id: str An identifier to be inserted to each occurrence-indexed predicate.
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:return: ``drt.DrtExpression``
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"""
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discourse_ids = ([discourse_id] if discourse_id is not None else None)
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d, = self.interpret_multi_sents([[input]], discourse_ids, question, verbose)
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if not d:
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raise Exception('Unable to interpret: "{0}"'.format(input))
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return d
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def interpret_multi(self, input, discourse_id=None, question=False, verbose=False):
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"""
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Use Boxer to give a first order representation.
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:param input: list of str Input sentences to parse as a single discourse
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:param occur_index: bool Should predicates be occurrence indexed?
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:param discourse_id: str An identifier to be inserted to each occurrence-indexed predicate.
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:return: ``drt.DrtExpression``
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"""
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discourse_ids = ([discourse_id] if discourse_id is not None else None)
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d, = self.interpret_multi_sents([input], discourse_ids, question, verbose)
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if not d:
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raise Exception('Unable to interpret: "{0}"'.format(input))
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return d
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def interpret_sents(self, inputs, discourse_ids=None, question=False, verbose=False):
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"""
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Use Boxer to give a first order representation.
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:param inputs: list of str Input sentences to parse as individual discourses
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:param occur_index: bool Should predicates be occurrence indexed?
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:param discourse_ids: list of str Identifiers to be inserted to each occurrence-indexed predicate.
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:return: list of ``drt.DrtExpression``
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"""
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return self.interpret_multi_sents([[input] for input in inputs], discourse_ids, question, verbose)
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def interpret_multi_sents(self, inputs, discourse_ids=None, question=False, verbose=False):
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"""
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Use Boxer to give a first order representation.
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:param inputs: list of list of str Input discourses to parse
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:param occur_index: bool Should predicates be occurrence indexed?
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:param discourse_ids: list of str Identifiers to be inserted to each occurrence-indexed predicate.
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:return: ``drt.DrtExpression``
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"""
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if discourse_ids is not None:
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assert len(inputs) == len(discourse_ids)
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assert reduce(operator.and_, (id is not None for id in discourse_ids))
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use_disc_id = True
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else:
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discourse_ids = list(map(str, range(len(inputs))))
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use_disc_id = False
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candc_out = self._call_candc(inputs, discourse_ids, question, verbose=verbose)
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boxer_out = self._call_boxer(candc_out, verbose=verbose)
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# if 'ERROR: input file contains no ccg/2 terms.' in boxer_out:
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# raise UnparseableInputException('Could not parse with candc: "%s"' % input_str)
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drs_dict = self._parse_to_drs_dict(boxer_out, use_disc_id)
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return [drs_dict.get(id, None) for id in discourse_ids]
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def _call_candc(self, inputs, discourse_ids, question, verbose=False):
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"""
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Call the ``candc`` binary with the given input.
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:param inputs: list of list of str Input discourses to parse
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:param discourse_ids: list of str Identifiers to be inserted to each occurrence-indexed predicate.
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:param filename: str A filename for the output file
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:return: stdout
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"""
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args = ['--models', os.path.join(self._candc_models_path, ['boxer','questions'][question]),
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'--candc-printer', 'boxer']
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return self._call('\n'.join(sum((["<META>'{0}'".format(id)] + d for d,id in zip(inputs,discourse_ids)), [])), self._candc_bin, args, verbose)
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def _call_boxer(self, candc_out, verbose=False):
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"""
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Call the ``boxer`` binary with the given input.
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:param candc_out: str output from C&C parser
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:return: stdout
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"""
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f = None
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try:
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fd, temp_filename = tempfile.mkstemp(prefix='boxer-', suffix='.in', text=True)
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f = os.fdopen(fd, 'w')
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f.write(candc_out)
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finally:
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if f: f.close()
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args = ['--box', 'false',
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'--semantics', 'drs',
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#'--flat', 'false', # removed from boxer
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'--resolve', ['false','true'][self._resolve],
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'--elimeq', ['false','true'][self._elimeq],
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'--format', 'prolog',
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'--instantiate', 'true',
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'--input', temp_filename]
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stdout = self._call(None, self._boxer_bin, args, verbose)
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os.remove(temp_filename)
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return stdout
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def _find_binary(self, name, bin_dir, verbose=False):
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return find_binary(name,
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path_to_bin=bin_dir,
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env_vars=['CANDC'],
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url='http://svn.ask.it.usyd.edu.au/trac/candc/',
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binary_names=[name, name + '.exe'],
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verbose=verbose)
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def _call(self, input_str, binary, args=[], verbose=False):
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"""
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Call the binary with the given input.
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:param input_str: A string whose contents are used as stdin.
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:param binary: The location of the binary to call
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:param args: A list of command-line arguments.
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:return: stdout
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"""
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if verbose:
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print('Calling:', binary)
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print('Args:', args)
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print('Input:', input_str)
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print('Command:', binary + ' ' + ' '.join(args))
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# Call via a subprocess
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if input_str is None:
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cmd = [binary] + args
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p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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else:
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cmd = 'echo "{0}" | {1} {2}'.format(input_str, binary, ' '.join(args))
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p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
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stdout, stderr = p.communicate()
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if verbose:
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print('Return code:', p.returncode)
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if stdout: print('stdout:\n', stdout, '\n')
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if stderr: print('stderr:\n', stderr, '\n')
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if p.returncode != 0:
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raise Exception('ERROR CALLING: {0} {1}\nReturncode: {2}\n{3}'.format(binary, ' '.join(args), p.returncode, stderr))
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return stdout
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def _parse_to_drs_dict(self, boxer_out, use_disc_id):
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lines = boxer_out.split('\n')
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drs_dict = {}
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i = 0
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while i < len(lines):
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line = lines[i]
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if line.startswith('id('):
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comma_idx = line.index(',')
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discourse_id = line[3:comma_idx]
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if discourse_id[0] == "'" and discourse_id[-1] == "'":
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discourse_id = discourse_id[1:-1]
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drs_id = line[comma_idx+1:line.index(')')]
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i += 1
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line = lines[i]
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assert line.startswith('sem({0},'.format(drs_id))
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if line[-4:] == "').'":
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line = line[:-4] + ")."
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assert line.endswith(').'), "can't parse line: {0}".format(line)
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search_start = len('sem({0},['.format(drs_id))
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brace_count = 1
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drs_start = -1
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for j,c in enumerate(line[search_start:]):
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if(c == '['):
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brace_count += 1
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if(c == ']'):
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brace_count -= 1
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if(brace_count == 0):
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drs_start = search_start + j + 1
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if line[drs_start:drs_start+3] == "','":
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drs_start = drs_start + 3
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else:
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drs_start = drs_start + 1
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break
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assert drs_start > -1
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drs_input = line[drs_start:-2].strip()
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parsed = self._parse_drs(drs_input, discourse_id, use_disc_id)
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drs_dict[discourse_id] = self._boxer_drs_interpreter.interpret(parsed)
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i += 1
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return drs_dict
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def _parse_drs(self, drs_string, discourse_id, use_disc_id):
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return BoxerOutputDrsParser([None,discourse_id][use_disc_id]).parse(drs_string)
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class BoxerOutputDrsParser(DrtParser):
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def __init__(self, discourse_id=None):
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"""
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This class is used to parse the Prolog DRS output from Boxer into a
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hierarchy of python objects.
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"""
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DrtParser.__init__(self)
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self.discourse_id = discourse_id
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self.sentence_id_offset = None
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self.quote_chars = [("'", "'", "\\", False)]
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def parse(self, data, signature=None):
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return DrtParser.parse(self, data, signature)
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def get_all_symbols(self):
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return ['(', ')', ',', '[', ']',':']
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def handle(self, tok, context):
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return self.handle_drs(tok)
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def attempt_adjuncts(self, expression, context):
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return expression
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def parse_condition(self, indices):
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"""
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Parse a DRS condition
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:return: list of ``DrtExpression``
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"""
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tok = self.token()
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accum = self.handle_condition(tok, indices)
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if accum is None:
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raise UnexpectedTokenException(tok)
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return accum
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def handle_drs(self, tok):
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if tok == 'drs':
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return self.parse_drs()
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elif tok in ['merge', 'smerge']:
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return self._handle_binary_expression(self._make_merge_expression)(None, [])
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elif tok in ['alfa']:
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return self._handle_alfa(self._make_merge_expression)(None, [])
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def handle_condition(self, tok, indices):
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"""
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Handle a DRS condition
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:param indices: list of int
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:return: list of ``DrtExpression``
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"""
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if tok == 'not':
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return [self._handle_not()]
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if tok == 'or':
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conds = [self._handle_binary_expression(self._make_or_expression)]
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elif tok == 'imp':
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conds = [self._handle_binary_expression(self._make_imp_expression)]
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elif tok == 'eq':
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conds = [self._handle_eq()]
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elif tok == 'prop':
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conds = [self._handle_prop()]
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elif tok == 'pred':
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conds = [self._handle_pred()]
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elif tok == 'named':
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conds = [self._handle_named()]
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elif tok == 'rel':
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conds = [self._handle_rel()]
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elif tok == 'timex':
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conds = self._handle_timex()
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elif tok == 'card':
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conds = [self._handle_card()]
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elif tok == 'whq':
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conds = [self._handle_whq()]
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elif tok == 'duplex':
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conds = [self._handle_duplex()]
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else:
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conds = []
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return sum([[cond(sent_index, word_indices) for cond in conds] for sent_index, word_indices in self._sent_and_word_indices(indices)], [])
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def _handle_not(self):
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self.assertToken(self.token(), '(')
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drs = self.process_next_expression(None)
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self.assertToken(self.token(), ')')
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return BoxerNot(drs)
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def _handle_pred(self):
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#pred(_G3943, dog, n, 0)
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self.assertToken(self.token(), '(')
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variable = self.parse_variable()
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self.assertToken(self.token(), ',')
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name = self.token()
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self.assertToken(self.token(), ',')
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pos = self.token()
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self.assertToken(self.token(), ',')
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sense = int(self.token())
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self.assertToken(self.token(), ')')
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def _handle_pred_f(sent_index, word_indices):
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return BoxerPred(self.discourse_id, sent_index, word_indices, variable, name, pos, sense)
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return _handle_pred_f
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def _handle_duplex(self):
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#duplex(whq, drs(...), var, drs(...))
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self.assertToken(self.token(), '(')
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# self.assertToken(self.token(), '[')
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ans_types = []
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# while self.token(0) != ']':
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# cat = self.token()
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# self.assertToken(self.token(), ':')
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# if cat == 'des':
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# ans_types.append(self.token())
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# elif cat == 'num':
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# ans_types.append('number')
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# typ = self.token()
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# if typ == 'cou':
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# ans_types.append('count')
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# else:
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# ans_types.append(typ)
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# else:
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# ans_types.append(self.token())
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# self.token() #swallow the ']'
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self.assertToken(self.token(), 'whq')
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self.assertToken(self.token(), ',')
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d1 = self.process_next_expression(None)
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self.assertToken(self.token(), ',')
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ref = self.parse_variable()
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self.assertToken(self.token(), ',')
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d2 = self.process_next_expression(None)
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self.assertToken(self.token(), ')')
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return lambda sent_index, word_indices: BoxerWhq(self.discourse_id, sent_index, word_indices, ans_types, d1, ref, d2)
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def _handle_named(self):
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#named(x0, john, per, 0)
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self.assertToken(self.token(), '(')
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variable = self.parse_variable()
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self.assertToken(self.token(), ',')
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name = self.token()
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self.assertToken(self.token(), ',')
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type = self.token()
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self.assertToken(self.token(), ',')
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sense = self.token() # as per boxer rev 2554
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self.assertToken(self.token(), ')')
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return lambda sent_index, word_indices: BoxerNamed(self.discourse_id, sent_index, word_indices, variable, name, type, sense)
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def _handle_rel(self):
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#rel(_G3993, _G3943, agent, 0)
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self.assertToken(self.token(), '(')
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var1 = self.parse_variable()
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self.assertToken(self.token(), ',')
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var2 = self.parse_variable()
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self.assertToken(self.token(), ',')
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rel = self.token()
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self.assertToken(self.token(), ',')
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sense = int(self.token())
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self.assertToken(self.token(), ')')
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return lambda sent_index, word_indices: BoxerRel(self.discourse_id, sent_index, word_indices, var1, var2, rel, sense)
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def _handle_timex(self):
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#timex(_G18322, date([]: (+), []:'XXXX', [1004]:'04', []:'XX'))
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self.assertToken(self.token(), '(')
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arg = self.parse_variable()
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self.assertToken(self.token(), ',')
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new_conds = self._handle_time_expression(arg)
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self.assertToken(self.token(), ')')
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return new_conds
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def _handle_time_expression(self, arg):
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#date([]: (+), []:'XXXX', [1004]:'04', []:'XX')
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tok = self.token()
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self.assertToken(self.token(), '(')
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if tok == 'date':
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conds = self._handle_date(arg)
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elif tok == 'time':
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conds = self._handle_time(arg)
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else:
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return None
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self.assertToken(self.token(), ')')
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return [lambda sent_index, word_indices: BoxerPred(self.discourse_id, sent_index, word_indices, arg, tok, 'n', 0)] + \
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[lambda sent_index, word_indices: cond for cond in conds]
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def _handle_date(self, arg):
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#[]: (+), []:'XXXX', [1004]:'04', []:'XX'
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conds = []
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(sent_index, word_indices), = self._sent_and_word_indices(self._parse_index_list())
|
|
self.assertToken(self.token(), '(')
|
|
pol = self.token()
|
|
self.assertToken(self.token(), ')')
|
|
conds.append(BoxerPred(self.discourse_id, sent_index, word_indices, arg, 'date_pol_{0}'.format(pol), 'a', 0))
|
|
self.assertToken(self.token(), ',')
|
|
|
|
(sent_index, word_indices), = self._sent_and_word_indices(self._parse_index_list())
|
|
year = self.token()
|
|
if year != 'XXXX':
|
|
year = year.replace(':', '_')
|
|
conds.append(BoxerPred(self.discourse_id, sent_index, word_indices, arg, 'date_year_{0}'.format(year), 'a', 0))
|
|
self.assertToken(self.token(), ',')
|
|
|
|
(sent_index, word_indices), = self._sent_and_word_indices(self._parse_index_list())
|
|
month = self.token()
|
|
if month != 'XX':
|
|
conds.append(BoxerPred(self.discourse_id, sent_index, word_indices, arg, 'date_month_{0}'.format(month), 'a', 0))
|
|
self.assertToken(self.token(), ',')
|
|
|
|
(sent_index, word_indices), = self._sent_and_word_indices(self._parse_index_list())
|
|
day = self.token()
|
|
if day != 'XX':
|
|
conds.append(BoxerPred(self.discourse_id, sent_index, word_indices, arg, 'date_day_{0}'.format(day), 'a', 0))
|
|
|
|
return conds
|
|
|
|
def _handle_time(self, arg):
|
|
#time([1018]:'18', []:'XX', []:'XX')
|
|
conds = []
|
|
self._parse_index_list()
|
|
hour = self.token()
|
|
if hour != 'XX':
|
|
conds.append(self._make_atom('r_hour_2',arg,hour))
|
|
self.assertToken(self.token(), ',')
|
|
|
|
self._parse_index_list()
|
|
min = self.token()
|
|
if min != 'XX':
|
|
conds.append(self._make_atom('r_min_2',arg,min))
|
|
self.assertToken(self.token(), ',')
|
|
|
|
self._parse_index_list()
|
|
sec = self.token()
|
|
if sec != 'XX':
|
|
conds.append(self._make_atom('r_sec_2',arg,sec))
|
|
|
|
return conds
|
|
|
|
def _handle_card(self):
|
|
#card(_G18535, 28, ge)
|
|
self.assertToken(self.token(), '(')
|
|
variable = self.parse_variable()
|
|
self.assertToken(self.token(), ',')
|
|
value = self.token()
|
|
self.assertToken(self.token(), ',')
|
|
type = self.token()
|
|
self.assertToken(self.token(), ')')
|
|
return lambda sent_index, word_indices: BoxerCard(self.discourse_id, sent_index, word_indices, variable, value, type)
|
|
|
|
def _handle_prop(self):
|
|
#prop(_G15949, drs(...))
|
|
self.assertToken(self.token(), '(')
|
|
variable = self.parse_variable()
|
|
self.assertToken(self.token(), ',')
|
|
drs = self.process_next_expression(None)
|
|
self.assertToken(self.token(), ')')
|
|
return lambda sent_index, word_indices: BoxerProp(self.discourse_id, sent_index, word_indices, variable, drs)
|
|
|
|
def _parse_index_list(self):
|
|
#[1001,1002]:
|
|
indices = []
|
|
self.assertToken(self.token(), '[')
|
|
while self.token(0) != ']':
|
|
indices.append(self.parse_index())
|
|
if self.token(0) == ',':
|
|
self.token() #swallow ','
|
|
self.token() #swallow ']'
|
|
self.assertToken(self.token(), ':')
|
|
return indices
|
|
|
|
def parse_drs(self):
|
|
#drs([[1001]:_G3943],
|
|
# [[1002]:pred(_G3943, dog, n, 0)]
|
|
# )
|
|
self.assertToken(self.token(), '(')
|
|
self.assertToken(self.token(), '[')
|
|
refs = set()
|
|
while self.token(0) != ']':
|
|
indices = self._parse_index_list()
|
|
refs.add(self.parse_variable())
|
|
if self.token(0) == ',':
|
|
self.token() #swallow ','
|
|
self.token() #swallow ']'
|
|
self.assertToken(self.token(), ',')
|
|
self.assertToken(self.token(), '[')
|
|
conds = []
|
|
while self.token(0) != ']':
|
|
indices = self._parse_index_list()
|
|
conds.extend(self.parse_condition(indices))
|
|
if self.token(0) == ',':
|
|
self.token() #swallow ','
|
|
self.token() #swallow ']'
|
|
self.assertToken(self.token(), ')')
|
|
return BoxerDrs(list(refs), conds)
|
|
|
|
def _handle_binary_expression(self, make_callback):
|
|
self.assertToken(self.token(), '(')
|
|
drs1 = self.process_next_expression(None)
|
|
self.assertToken(self.token(), ',')
|
|
drs2 = self.process_next_expression(None)
|
|
self.assertToken(self.token(), ')')
|
|
return lambda sent_index, word_indices: make_callback(sent_index, word_indices, drs1, drs2)
|
|
|
|
def _handle_alfa(self, make_callback):
|
|
self.assertToken(self.token(), '(')
|
|
type = self.token()
|
|
self.assertToken(self.token(), ',')
|
|
drs1 = self.process_next_expression(None)
|
|
self.assertToken(self.token(), ',')
|
|
drs2 = self.process_next_expression(None)
|
|
self.assertToken(self.token(), ')')
|
|
return lambda sent_index, word_indices: make_callback(sent_index, word_indices, drs1, drs2)
|
|
|
|
def _handle_eq(self):
|
|
self.assertToken(self.token(), '(')
|
|
var1 = self.parse_variable()
|
|
self.assertToken(self.token(), ',')
|
|
var2 = self.parse_variable()
|
|
self.assertToken(self.token(), ')')
|
|
return lambda sent_index, word_indices: BoxerEq(self.discourse_id, sent_index, word_indices, var1, var2)
|
|
|
|
|
|
def _handle_whq(self):
|
|
self.assertToken(self.token(), '(')
|
|
self.assertToken(self.token(), '[')
|
|
ans_types = []
|
|
while self.token(0) != ']':
|
|
cat = self.token()
|
|
self.assertToken(self.token(), ':')
|
|
if cat == 'des':
|
|
ans_types.append(self.token())
|
|
elif cat == 'num':
|
|
ans_types.append('number')
|
|
typ = self.token()
|
|
if typ == 'cou':
|
|
ans_types.append('count')
|
|
else:
|
|
ans_types.append(typ)
|
|
else:
|
|
ans_types.append(self.token())
|
|
self.token() #swallow the ']'
|
|
|
|
self.assertToken(self.token(), ',')
|
|
d1 = self.process_next_expression(None)
|
|
self.assertToken(self.token(), ',')
|
|
ref = self.parse_variable()
|
|
self.assertToken(self.token(), ',')
|
|
d2 = self.process_next_expression(None)
|
|
self.assertToken(self.token(), ')')
|
|
return lambda sent_index, word_indices: BoxerWhq(self.discourse_id, sent_index, word_indices, ans_types, d1, ref, d2)
|
|
|
|
def _make_merge_expression(self, sent_index, word_indices, drs1, drs2):
|
|
return BoxerDrs(drs1.refs + drs2.refs, drs1.conds + drs2.conds)
|
|
|
|
def _make_or_expression(self, sent_index, word_indices, drs1, drs2):
|
|
return BoxerOr(self.discourse_id, sent_index, word_indices, drs1, drs2)
|
|
|
|
def _make_imp_expression(self, sent_index, word_indices, drs1, drs2):
|
|
return BoxerDrs(drs1.refs, drs1.conds, drs2)
|
|
|
|
def parse_variable(self):
|
|
var = self.token()
|
|
assert re.match('^[exps]\d+$', var), var
|
|
return var
|
|
|
|
def parse_index(self):
|
|
return int(self.token())
|
|
|
|
def _sent_and_word_indices(self, indices):
|
|
"""
|
|
:return: list of (sent_index, word_indices) tuples
|
|
"""
|
|
sent_indices = set((i / 1000)-1 for i in indices if i>=0)
|
|
if sent_indices:
|
|
pairs = []
|
|
for sent_index in sent_indices:
|
|
word_indices = [(i % 1000)-1 for i in indices if sent_index == (i / 1000)-1]
|
|
pairs.append((sent_index, word_indices))
|
|
return pairs
|
|
else:
|
|
word_indices = [(i % 1000)-1 for i in indices]
|
|
return [(None, word_indices)]
|
|
|
|
|
|
class BoxerDrsParser(DrtParser):
|
|
"""
|
|
Reparse the str form of subclasses of ``AbstractBoxerDrs``
|
|
"""
|
|
def __init__(self, discourse_id=None):
|
|
DrtParser.__init__(self)
|
|
self.discourse_id = discourse_id
|
|
|
|
def get_all_symbols(self):
|
|
return [DrtTokens.OPEN, DrtTokens.CLOSE, DrtTokens.COMMA, DrtTokens.OPEN_BRACKET, DrtTokens.CLOSE_BRACKET]
|
|
|
|
def attempt_adjuncts(self, expression, context):
|
|
return expression
|
|
|
|
def handle(self, tok, context):
|
|
try:
|
|
# if tok == 'drs':
|
|
# self.assertNextToken(DrtTokens.OPEN)
|
|
# label = int(self.token())
|
|
# self.assertNextToken(DrtTokens.COMMA)
|
|
# refs = list(map(int, self.handle_refs()))
|
|
# self.assertNextToken(DrtTokens.COMMA)
|
|
# conds = self.handle_conds(None)
|
|
# self.assertNextToken(DrtTokens.CLOSE)
|
|
# return BoxerDrs(label, refs, conds)
|
|
if tok == 'pred':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
disc_id = (self.token(), self.discourse_id)[self.discourse_id is not None]
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sent_id = self.nullableIntToken()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
word_ids = list(map(int, self.handle_refs()))
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
variable = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
name = self.token()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
pos = self.token()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sense = int(self.token())
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerPred(disc_id, sent_id, word_ids, variable, name, pos, sense)
|
|
elif tok == 'named':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
disc_id = (self.token(), self.discourse_id)[self.discourse_id is not None]
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sent_id = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
word_ids = map(int, self.handle_refs())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
variable = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
name = self.token()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
type = self.token()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sense = int(self.token())
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerNamed(disc_id, sent_id, word_ids, variable, name, type, sense)
|
|
elif tok == 'rel':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
disc_id = (self.token(), self.discourse_id)[self.discourse_id is not None]
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sent_id = self.nullableIntToken()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
word_ids = list(map(int, self.handle_refs()))
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
var1 = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
var2 = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
rel = self.token()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sense = int(self.token())
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerRel(disc_id, sent_id, word_ids, var1, var2, rel, sense)
|
|
elif tok == 'prop':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
disc_id = (self.token(), self.discourse_id)[self.discourse_id is not None]
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sent_id = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
word_ids = list(map(int, self.handle_refs()))
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
variable = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
drs = self.process_next_expression(None)
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerProp(disc_id, sent_id, word_ids, variable, drs)
|
|
elif tok == 'not':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
drs = self.process_next_expression(None)
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerNot(drs)
|
|
elif tok == 'imp':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
drs1 = self.process_next_expression(None)
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
drs2 = self.process_next_expression(None)
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerDrs(drs1.refs, drs1.conds, drs2)
|
|
elif tok == 'or':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
disc_id = (self.token(), self.discourse_id)[self.discourse_id is not None]
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sent_id = self.nullableIntToken()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
word_ids = map(int, self.handle_refs())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
drs1 = self.process_next_expression(None)
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
drs2 = self.process_next_expression(None)
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerOr(disc_id, sent_id, word_ids, drs1, drs2)
|
|
elif tok == 'eq':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
disc_id = (self.token(), self.discourse_id)[self.discourse_id is not None]
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sent_id = self.nullableIntToken()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
word_ids = list(map(int, self.handle_refs()))
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
var1 = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
var2 = int(self.token())
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerEq(disc_id, sent_id, word_ids, var1, var2)
|
|
elif tok == 'card':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
disc_id = (self.token(), self.discourse_id)[self.discourse_id is not None]
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sent_id = self.nullableIntToken()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
word_ids = map(int, self.handle_refs())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
var = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
value = self.token()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
type = self.token()
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerCard(disc_id, sent_id, word_ids, var, value, type)
|
|
elif tok == 'whq':
|
|
self.assertNextToken(DrtTokens.OPEN)
|
|
disc_id = (self.token(), self.discourse_id)[self.discourse_id is not None]
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
sent_id = self.nullableIntToken()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
word_ids = list(map(int, self.handle_refs()))
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
ans_types = self.handle_refs()
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
drs1 = self.process_next_expression(None)
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
var = int(self.token())
|
|
self.assertNextToken(DrtTokens.COMMA)
|
|
drs2 = self.process_next_expression(None)
|
|
self.assertNextToken(DrtTokens.CLOSE)
|
|
return BoxerWhq(disc_id, sent_id, word_ids, ans_types, drs1, var, drs2)
|
|
except Exception as e:
|
|
raise LogicalExpressionException(self._currentIndex, str(e))
|
|
assert False, repr(tok)
|
|
|
|
def nullableIntToken(self):
|
|
t = self.token()
|
|
return [None,int(t)][t != 'None']
|
|
|
|
def get_next_token_variable(self, description):
|
|
try:
|
|
return self.token()
|
|
except ExpectedMoreTokensException as e:
|
|
raise ExpectedMoreTokensException(e.index, 'Variable expected.')
|
|
|
|
|
|
|
|
class AbstractBoxerDrs(object):
|
|
def variables(self):
|
|
"""
|
|
:return: (set<variables>, set<events>, set<propositions>)
|
|
"""
|
|
variables, events, propositions = self._variables()
|
|
return (variables - (events | propositions), events, propositions - events)
|
|
|
|
def variable_types(self):
|
|
vartypes = {}
|
|
for t,vars in zip(('z','e','p'), self.variables()):
|
|
for v in vars:
|
|
vartypes[v] = t
|
|
return vartypes
|
|
|
|
def _variables(self):
|
|
"""
|
|
:return: (set<variables>, set<events>, set<propositions>)
|
|
"""
|
|
return (set(), set(), set())
|
|
|
|
def atoms(self):
|
|
return set()
|
|
|
|
def clean(self):
|
|
return self
|
|
|
|
def _clean_name(self, name):
|
|
return name.replace('-','_').replace("'", "_")
|
|
|
|
def renumber_sentences(self, f):
|
|
return self
|
|
|
|
def __hash__(self):
|
|
return hash("{0}".format(self))
|
|
|
|
|
|
@python_2_unicode_compatible
|
|
class BoxerDrs(AbstractBoxerDrs):
|
|
def __init__(self, refs, conds, consequent=None):
|
|
AbstractBoxerDrs.__init__(self)
|
|
self.refs = refs
|
|
self.conds = conds
|
|
self.consequent = consequent
|
|
|
|
def _variables(self):
|
|
variables = (set(), set(), set())
|
|
for cond in self.conds:
|
|
for s,v in zip(variables, cond._variables()):
|
|
s.update(v)
|
|
if self.consequent is not None:
|
|
for s,v in zip(variables, self.consequent._variables()):
|
|
s.update(v)
|
|
return variables
|
|
|
|
def atoms(self):
|
|
atoms = reduce(operator.or_, (cond.atoms() for cond in self.conds), set())
|
|
if self.consequent is not None:
|
|
atoms.update(self.consequent.atoms())
|
|
return atoms
|
|
|
|
def clean(self):
|
|
consequent = (self.consequent.clean() if self.consequent else None)
|
|
return BoxerDrs(self.refs, [c.clean() for c in self.conds], consequent)
|
|
|
|
def renumber_sentences(self, f):
|
|
consequent = (self.consequent.renumber_sentences(f) if self.consequent else None)
|
|
return BoxerDrs(self.refs, [c.renumber_sentences(f) for c in self.conds], consequent)
|
|
|
|
def __repr__(self):
|
|
s = 'drs([%s], [%s])' % (', '.join("%s" % r for r in self.refs),
|
|
', '.join("%s" % c for c in self.conds))
|
|
if self.consequent is not None:
|
|
s = 'imp(%s, %s)' % (s, self.consequent)
|
|
return s
|
|
|
|
def __eq__(self, other):
|
|
return self.__class__ == other.__class__ and \
|
|
self.refs == other.refs and \
|
|
len(self.conds) == len(other.conds) and \
|
|
reduce(operator.and_, (c1==c2 for c1,c2 in zip(self.conds, other.conds))) and \
|
|
self.consequent == other.consequent
|
|
|
|
def __ne__(self, other):
|
|
return not self == other
|
|
|
|
__hash__ = AbstractBoxerDrs.__hash__
|
|
|
|
|
|
@python_2_unicode_compatible
|
|
class BoxerNot(AbstractBoxerDrs):
|
|
def __init__(self, drs):
|
|
AbstractBoxerDrs.__init__(self)
|
|
self.drs = drs
|
|
|
|
def _variables(self):
|
|
return self.drs._variables()
|
|
|
|
def atoms(self):
|
|
return self.drs.atoms()
|
|
|
|
def clean(self):
|
|
return BoxerNot(self.drs.clean())
|
|
|
|
def renumber_sentences(self, f):
|
|
return BoxerNot(self.drs.renumber_sentences(f))
|
|
|
|
def __repr__(self):
|
|
return 'not(%s)' % (self.drs)
|
|
|
|
def __eq__(self, other):
|
|
return self.__class__ == other.__class__ and self.drs == other.drs
|
|
|
|
def __ne__(self, other):
|
|
return not self == other
|
|
|
|
__hash__ = AbstractBoxerDrs.__hash__
|
|
|
|
@python_2_unicode_compatible
|
|
class BoxerIndexed(AbstractBoxerDrs):
|
|
def __init__(self, discourse_id, sent_index, word_indices):
|
|
AbstractBoxerDrs.__init__(self)
|
|
self.discourse_id = discourse_id
|
|
self.sent_index = sent_index
|
|
self.word_indices = word_indices
|
|
|
|
def atoms(self):
|
|
return set([self])
|
|
|
|
def __eq__(self, other):
|
|
return self.__class__ == other.__class__ and \
|
|
self.discourse_id == other.discourse_id and \
|
|
self.sent_index == other.sent_index and \
|
|
self.word_indices == other.word_indices and \
|
|
reduce(operator.and_, (s==o for s,o in zip(self, other)))
|
|
|
|
def __ne__(self, other):
|
|
return not self == other
|
|
|
|
__hash__ = AbstractBoxerDrs.__hash__
|
|
|
|
def __repr__(self):
|
|
s = '%s(%s, %s, [%s]' % (self._pred(), self.discourse_id,
|
|
self.sent_index, ', '.join("%s" % wi for wi in self.word_indices))
|
|
for v in self:
|
|
s += ', %s' % v
|
|
return s + ')'
|
|
|
|
class BoxerPred(BoxerIndexed):
|
|
def __init__(self, discourse_id, sent_index, word_indices, var, name, pos, sense):
|
|
BoxerIndexed.__init__(self, discourse_id, sent_index, word_indices)
|
|
self.var = var
|
|
self.name = name
|
|
self.pos = pos
|
|
self.sense = sense
|
|
|
|
def _variables(self):
|
|
return (set([self.var]), set(), set())
|
|
|
|
def change_var(self, var):
|
|
return BoxerPred(self.discourse_id, self.sent_index, self.word_indices, var, self.name, self.pos, self.sense)
|
|
|
|
def clean(self):
|
|
return BoxerPred(self.discourse_id, self.sent_index, self.word_indices, self.var, self._clean_name(self.name), self.pos, self.sense)
|
|
|
|
def renumber_sentences(self, f):
|
|
new_sent_index = f(self.sent_index)
|
|
return BoxerPred(self.discourse_id, new_sent_index, self.word_indices, self.var, self.name, self.pos, self.sense)
|
|
|
|
def __iter__(self):
|
|
return iter((self.var, self.name, self.pos, self.sense))
|
|
|
|
def _pred(self):
|
|
return 'pred'
|
|
|
|
class BoxerNamed(BoxerIndexed):
|
|
def __init__(self, discourse_id, sent_index, word_indices, var, name, type, sense):
|
|
BoxerIndexed.__init__(self, discourse_id, sent_index, word_indices)
|
|
self.var = var
|
|
self.name = name
|
|
self.type = type
|
|
self.sense = sense
|
|
|
|
def _variables(self):
|
|
return (set([self.var]), set(), set())
|
|
|
|
def change_var(self, var):
|
|
return BoxerNamed(self.discourse_id, self.sent_index, self.word_indices, var, self.name, self.type, self.sense)
|
|
|
|
def clean(self):
|
|
return BoxerNamed(self.discourse_id, self.sent_index, self.word_indices, self.var, self._clean_name(self.name), self.type, self.sense)
|
|
|
|
def renumber_sentences(self, f):
|
|
return BoxerNamed(self.discourse_id, f(self.sent_index), self.word_indices, self.var, self.name, self.type, self.sense)
|
|
|
|
def __iter__(self):
|
|
return iter((self.var, self.name, self.type, self.sense))
|
|
|
|
def _pred(self):
|
|
return 'named'
|
|
|
|
class BoxerRel(BoxerIndexed):
|
|
def __init__(self, discourse_id, sent_index, word_indices, var1, var2, rel, sense):
|
|
BoxerIndexed.__init__(self, discourse_id, sent_index, word_indices)
|
|
self.var1 = var1
|
|
self.var2 = var2
|
|
self.rel = rel
|
|
self.sense = sense
|
|
|
|
def _variables(self):
|
|
return (set([self.var1, self.var2]), set(), set())
|
|
|
|
def clean(self):
|
|
return BoxerRel(self.discourse_id, self.sent_index, self.word_indices, self.var1, self.var2, self._clean_name(self.rel), self.sense)
|
|
|
|
def renumber_sentences(self, f):
|
|
return BoxerRel(self.discourse_id, f(self.sent_index), self.word_indices, self.var1, self.var2, self.rel, self.sense)
|
|
|
|
def __iter__(self):
|
|
return iter((self.var1, self.var2, self.rel, self.sense))
|
|
|
|
def _pred(self):
|
|
return 'rel'
|
|
|
|
class BoxerProp(BoxerIndexed):
|
|
def __init__(self, discourse_id, sent_index, word_indices, var, drs):
|
|
BoxerIndexed.__init__(self, discourse_id, sent_index, word_indices)
|
|
self.var = var
|
|
self.drs = drs
|
|
|
|
def _variables(self):
|
|
return tuple(map(operator.or_, (set(), set(), set([self.var])), self.drs._variables()))
|
|
|
|
def referenced_labels(self):
|
|
return set([self.drs])
|
|
|
|
def atoms(self):
|
|
return self.drs.atoms()
|
|
|
|
def clean(self):
|
|
return BoxerProp(self.discourse_id, self.sent_index, self.word_indices, self.var, self.drs.clean())
|
|
|
|
def renumber_sentences(self, f):
|
|
return BoxerProp(self.discourse_id, f(self.sent_index), self.word_indices, self.var, self.drs.renumber_sentences(f))
|
|
|
|
def __iter__(self):
|
|
return iter((self.var, self.drs))
|
|
|
|
def _pred(self):
|
|
return 'prop'
|
|
|
|
class BoxerEq(BoxerIndexed):
|
|
def __init__(self, discourse_id, sent_index, word_indices, var1, var2):
|
|
BoxerIndexed.__init__(self, discourse_id, sent_index, word_indices)
|
|
self.var1 = var1
|
|
self.var2 = var2
|
|
|
|
def _variables(self):
|
|
return (set([self.var1, self.var2]), set(), set())
|
|
|
|
def atoms(self):
|
|
return set()
|
|
|
|
def renumber_sentences(self, f):
|
|
return BoxerEq(self.discourse_id, f(self.sent_index), self.word_indices, self.var1, self.var2)
|
|
|
|
def __iter__(self):
|
|
return iter((self.var1, self.var2))
|
|
|
|
def _pred(self):
|
|
return 'eq'
|
|
|
|
class BoxerCard(BoxerIndexed):
|
|
def __init__(self, discourse_id, sent_index, word_indices, var, value, type):
|
|
BoxerIndexed.__init__(self, discourse_id, sent_index, word_indices)
|
|
self.var = var
|
|
self.value = value
|
|
self.type = type
|
|
|
|
def _variables(self):
|
|
return (set([self.var]), set(), set())
|
|
|
|
def renumber_sentences(self, f):
|
|
return BoxerCard(self.discourse_id, f(self.sent_index), self.word_indices, self.var, self.value, self.type)
|
|
|
|
def __iter__(self):
|
|
return iter((self.var, self.value, self.type))
|
|
|
|
def _pred(self):
|
|
return 'card'
|
|
|
|
class BoxerOr(BoxerIndexed):
|
|
def __init__(self, discourse_id, sent_index, word_indices, drs1, drs2):
|
|
BoxerIndexed.__init__(self, discourse_id, sent_index, word_indices)
|
|
self.drs1 = drs1
|
|
self.drs2 = drs2
|
|
|
|
def _variables(self):
|
|
return tuple(map(operator.or_, self.drs1._variables(), self.drs2._variables()))
|
|
|
|
def atoms(self):
|
|
return self.drs1.atoms() | self.drs2.atoms()
|
|
|
|
def clean(self):
|
|
return BoxerOr(self.discourse_id, self.sent_index, self.word_indices, self.drs1.clean(), self.drs2.clean())
|
|
|
|
def renumber_sentences(self, f):
|
|
return BoxerOr(self.discourse_id, f(self.sent_index), self.word_indices, self.drs1, self.drs2)
|
|
|
|
def __iter__(self):
|
|
return iter((self.drs1, self.drs2))
|
|
|
|
def _pred(self):
|
|
return 'or'
|
|
|
|
class BoxerWhq(BoxerIndexed):
|
|
def __init__(self, discourse_id, sent_index, word_indices, ans_types, drs1, variable, drs2):
|
|
BoxerIndexed.__init__(self, discourse_id, sent_index, word_indices)
|
|
self.ans_types = ans_types
|
|
self.drs1 = drs1
|
|
self.variable = variable
|
|
self.drs2 = drs2
|
|
|
|
def _variables(self):
|
|
return tuple(map(operator.or_, (set([self.variable]), set(), set()), self.drs1._variables(), self.drs2._variables()))
|
|
|
|
def atoms(self):
|
|
return self.drs1.atoms() | self.drs2.atoms()
|
|
|
|
def clean(self):
|
|
return BoxerWhq(self.discourse_id, self.sent_index, self.word_indices, self.ans_types, self.drs1.clean(), self.variable, self.drs2.clean())
|
|
|
|
def renumber_sentences(self, f):
|
|
return BoxerWhq(self.discourse_id, f(self.sent_index), self.word_indices, self.ans_types, self.drs1, self.variable, self.drs2)
|
|
|
|
def __iter__(self):
|
|
return iter(('['+','.join(self.ans_types)+']', self.drs1, self.variable, self.drs2))
|
|
|
|
def _pred(self):
|
|
return 'whq'
|
|
|
|
|
|
|
|
class PassthroughBoxerDrsInterpreter(object):
|
|
def interpret(self, ex):
|
|
return ex
|
|
|
|
|
|
class NltkDrtBoxerDrsInterpreter(object):
|
|
def __init__(self, occur_index=False):
|
|
self._occur_index = occur_index
|
|
|
|
def interpret(self, ex):
|
|
"""
|
|
:param ex: ``AbstractBoxerDrs``
|
|
:return: ``DrtExpression``
|
|
"""
|
|
if isinstance(ex, BoxerDrs):
|
|
drs = DRS([Variable(r) for r in ex.refs], list(map(self.interpret, ex.conds)))
|
|
if ex.consequent is not None:
|
|
drs.consequent = self.interpret(ex.consequent)
|
|
return drs
|
|
elif isinstance(ex, BoxerNot):
|
|
return DrtNegatedExpression(self.interpret(ex.drs))
|
|
elif isinstance(ex, BoxerPred):
|
|
pred = self._add_occur_indexing('%s_%s' % (ex.pos, ex.name), ex)
|
|
return self._make_atom(pred, ex.var)
|
|
elif isinstance(ex, BoxerNamed):
|
|
pred = self._add_occur_indexing('ne_%s_%s' % (ex.type, ex.name), ex)
|
|
return self._make_atom(pred, ex.var)
|
|
elif isinstance(ex, BoxerRel):
|
|
pred = self._add_occur_indexing('%s' % (ex.rel), ex)
|
|
return self._make_atom(pred, ex.var1, ex.var2)
|
|
elif isinstance(ex, BoxerProp):
|
|
return DrtProposition(Variable(ex.var), self.interpret(ex.drs))
|
|
elif isinstance(ex, BoxerEq):
|
|
return DrtEqualityExpression(DrtVariableExpression(Variable(ex.var1)),
|
|
DrtVariableExpression(Variable(ex.var2)))
|
|
elif isinstance(ex, BoxerCard):
|
|
pred = self._add_occur_indexing('card_%s_%s' % (ex.type, ex.value), ex)
|
|
return self._make_atom(pred, ex.var)
|
|
elif isinstance(ex, BoxerOr):
|
|
return DrtOrExpression(self.interpret(ex.drs1), self.interpret(ex.drs2))
|
|
elif isinstance(ex, BoxerWhq):
|
|
drs1 = self.interpret(ex.drs1)
|
|
drs2 = self.interpret(ex.drs2)
|
|
return DRS(drs1.refs + drs2.refs, drs1.conds + drs2.conds)
|
|
assert False, '%s: %s' % (ex.__class__.__name__, ex)
|
|
|
|
def _make_atom(self, pred, *args):
|
|
accum = DrtVariableExpression(Variable(pred))
|
|
for arg in args:
|
|
accum = DrtApplicationExpression(accum, DrtVariableExpression(Variable(arg)))
|
|
return accum
|
|
|
|
def _add_occur_indexing(self, base, ex):
|
|
if self._occur_index and ex.sent_index is not None:
|
|
if ex.discourse_id:
|
|
base += '_%s' % ex.discourse_id
|
|
base += '_s%s' % ex.sent_index
|
|
base += '_w%s' % sorted(ex.word_indices)[0]
|
|
return base
|
|
|
|
|
|
class UnparseableInputException(Exception):
|
|
pass
|
|
|
|
|
|
if __name__ == '__main__':
|
|
opts = OptionParser("usage: %prog TEXT [options]")
|
|
opts.add_option("--verbose", "-v", help="display verbose logs", action="store_true", default=False, dest="verbose")
|
|
opts.add_option("--fol", "-f", help="output FOL", action="store_true", default=False, dest="fol")
|
|
opts.add_option("--question", "-q", help="input is a question", action="store_true", default=False, dest="question")
|
|
opts.add_option("--occur", "-o", help="occurrence index", action="store_true", default=False, dest="occur_index")
|
|
(options, args) = opts.parse_args()
|
|
|
|
if len(args) != 1:
|
|
opts.error("incorrect number of arguments")
|
|
|
|
interpreter = NltkDrtBoxerDrsInterpreter(occur_index=options.occur_index)
|
|
drs = Boxer(interpreter).interpret_multi(args[0].split(r'\n'), question=options.question, verbose=options.verbose)
|
|
if drs is None:
|
|
print(None)
|
|
else:
|
|
drs = drs.simplify().eliminate_equality()
|
|
if options.fol:
|
|
print(drs.fol().normalize())
|
|
else:
|
|
drs.pretty_print()
|