(tag, word)
else:
# Get all signs that correspond to this tag from the grammar
word_signs = grammar.get_signs_for_word(word,
tags=[tag],
extra_features={
'duration':
duration,
'time': time,
})
tags.append(word_signs)
tagger = PretaggedTagger(grammar, input.slice(start, end), tags=tags)
# Use the directed parser to try parsing according to this tree
parser = DirectedCkyParser(grammar,
tagger,
derivation_tree=sub_tree,
options=popts)
try:
parser.parse(derivations=True)
except DirectedParseError, err:
# Parse failed, so we can't train on this sequence
raise ParseError, "[Partial parse %d (%d-%d)] parsing using "\
"the derivation tree failed: %s" % (i,start,end,err)
# We should now have a complete parse available
parses = parser.chart.parses
if len(parses) == 0:
raise ParseError, "[Partial parse %d (%d-%d)] parsing using the "\
"derivation tree did not produce any results" % (i,start,end)
elif len(parses) > 1:
raise ParseError, "the annotated tree gave multiple "\
"parse results: %s" % ", ".join(["%s" % p for p in parses])
