def compose_utterance_greedy(self, da):
"""\
Compose an utterance from templates by iteratively looking for
the longest (up to self.compose_greedy_lookahead) matching
sub-utterance at the current position in the DA.
Returns the composed utterance.
"""
composed_utt = []
sub_start = 0
# pass through the dialogue act
while sub_start < len(da):
dax_utt = None
dax_len = None
# greedily look for the longest template that will cover the next
# dialogue act items (try longer templates first, from maximum
# length given in settings down to 1).
for sub_len in xrange(self.compose_greedy_lookahead, 0, -1):
dax = DialogueAct()
dax.extend(da[sub_start:sub_start + sub_len])
try:
# try to find an exact match
dax_utt = self.random_select(self.templates[unicode(dax)])
dax_len = sub_len
break
except KeyError:
# try to find a relaxed match
svsx = dax.get_slots_and_values()
try:
dax_utt = self.match_and_fill_generic(dax, svsx)
dax_len = sub_len
break
except TemplateNLGException:
# nothing found: look for shorter templates
continue
if dax_utt is None: # dummy backoff
dax_utt = unicode(da[sub_start])
dax_len = 1
composed_utt.append(dax_utt)
sub_start += dax_len
return ' '.join(composed_utt)
def compose_utterance_greedy(self, da):
"""\
Compose an utterance from templates by iteratively looking for
the longest (up to self.compose_greedy_lookahead) matching
sub-utterance at the current position in the DA.
Returns the composed utterance.
"""
composed_utt = []
sub_start = 0
# pass through the dialogue act
while sub_start < len(da):
dax_utt = None
dax_len = None
# greedily look for the longest template that will cover the next
# dialogue act items (try longer templates first, from maximum
# length given in settings down to 1).
for sub_len in xrange(self.compose_greedy_lookahead, 0, -1):
dax = DialogueAct()
dax.extend(da[sub_start:sub_start + sub_len])
try:
# try to find an exact match
dax_utt = self.random_select(self.templates[unicode(dax)])
dax_len = sub_len
break
except KeyError:
# try to find a relaxed match
svsx = dax.get_slots_and_values()
try:
dax_utt = self.match_and_fill_generic(dax, svsx)
dax_len = sub_len
break
except TemplateNLGException:
# nothing found: look for shorter templates
continue
if dax_utt is None: # dummy backoff
dax_utt = unicode(da[sub_start])
dax_len = 1
composed_utt.append(dax_utt)
sub_start += dax_len
return ' '.join(composed_utt)
def compose_utterance_single(self, da):
"""\
Compose an utterance from templates for single dialogue act items.
Returns the composed utterance.
"""
composed_utt = []
# try to find a template for each single dialogue act item
for dai in da:
try:
# look for an exact match
dai_utt = self.random_select(self.templates[unicode(dai)])
except KeyError:
# try to find a relaxed match
dax = DialogueAct()
dax.append(dai)
svsx = dax.get_slots_and_values()
try:
dai_utt = self.match_and_fill_generic(dax, svsx)
except TemplateNLGException:
dai_utt = unicode(dai)
composed_utt.append(dai_utt)
return ' '.join(composed_utt)
def compose_utterance_single(self, da):
"""\
Compose an utterance from templates for single dialogue act items.
Returns the composed utterance.
"""
composed_utt = []
# try to find a template for each single dialogue act item
for dai in da:
try:
# look for an exact match
dai_utt = self.random_select(self.templates[unicode(dai)])
except KeyError:
# try to find a relaxed match
dax = DialogueAct()
dax.append(dai)
svsx = dax.get_slots_and_values()
try:
dai_utt = self.match_and_fill_generic(dax, svsx)
except TemplateNLGException:
dai_utt = unicode(dai)
composed_utt.append(dai_utt)
return ' '.join(composed_utt)