def pennconverter_find_heads(tree, head_map=None):
if head_map is None:
head_map = {}
tree = treebanks.remove_coindexation(tree, False)
for subtree in tree.subtrees:
pennconverter_find_heads(subtree, head_map)
if log: print "Head for", tree.span, tree.label
# A word is it's own head
if tree.word is not None:
head = (tree.span, tree.word, tree.label)
add_head(head_map, tree, head)
return head_map
# First handle conjunctions
coord = pennconverter_is_coord(tree)
if coord:
if not add_if_match(tree, {'CC', 'CONJP'}, head_map, True):
if not add_if_match(tree, {',', ':'}, head_map, True):
add_head(head_map, tree, get_head(head_map, tree.subtrees[-1]))
return head_map
# If the label for this node is not in the table we are either at the bottom,
# at an NP, or have an error
base_label = treebanks.split_label_type_and_function(tree.label)[0]
if base_label not in pennconverter_mapping_table:
if base_label in ['NP', 'NML']:
collins_NP(tree, head_map)
elif base_label in ['PP', 'WHPP']:
pennconverter_PP(tree, head_map)
else:
add_head(head_map, tree, get_head(head_map, tree.subtrees[-1]))
return head_map
# Look through and take the first/last occurrence that matches
info = pennconverter_mapping_table[base_label]
for label in info[1]:
for i in xrange(len(tree.subtrees)):
if info[0] == 'right':
i = len(tree.subtrees) - i - 1
subtree = tree.subtrees[i]
if isinstance(label, str):
if subtree.label == label:
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
else:
if re.match(label, subtree.label) is not None:
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
# Final fallback
if info[0] == 'left':
add_head(head_map, tree, get_head(head_map, tree.subtrees[0]))
else:
add_head(head_map, tree, get_head(head_map, tree.subtrees[-1]))
return head_map
def get_signature(head_map, tree):
tree_repr = (tree.span, tree.label)
if tree_repr in head_map:
return tree_repr
tree_repr = (tree.wordspan, treebanks.remove_coindexation(tree, False).label)
if tree_repr in head_map:
return tree_repr
tree_repr = (tree.wordspan, treebanks.split_label_type_and_function(tree.label)[0])
if tree_repr in head_map:
return tree_repr
return None
def get_signature(head_map, tree):
tree_repr = (tree.span, tree.label)
if tree_repr in head_map:
return tree_repr
tree_repr = (tree.wordspan, treebanks.remove_coindexation(tree, False).label)
if tree_repr in head_map:
return tree_repr
tree_repr = (tree.wordspan, without_func(tree.label))
if tree_repr in head_map:
return tree_repr
return None
def get_head(head_map, tree, amend_for_trace=False):
if not amend_for_trace:
tree_repr = (tree.span, tree.label)
if tree_repr in head_map:
return head_map[tree_repr]
tree_repr = (tree.wordspan, treebanks.remove_coindexation(tree, False).label)
if tree_repr in head_map:
return head_map[tree_repr]
tree_repr = (tree.wordspan, treebanks.split_label_type_and_function(tree.label)[0])
if tree_repr in head_map:
return head_map[tree_repr]
return None
def get_head(head_map, tree, amend_for_trace=False):
if not amend_for_trace:
tree_repr = (tree.span, tree.label)
if tree_repr in head_map:
return head_map[tree_repr]
tree_repr = (tree.wordspan, treebanks.remove_coindexation(tree, False).label)
if tree_repr in head_map:
return head_map[tree_repr]
tree_repr = (tree.wordspan, without_func(tree.label))
if tree_repr in head_map:
return head_map[tree_repr]
return None
def text_tree(tree,
single_line=True,
show_traces=False,
depth=0,
dense=True,
newline=True,
match_ptb=False,
prev_and=False):
if not show_traces:
tree = treebanks.remove_traces(tree, False)
tree = treebanks.remove_coindexation(tree, False)
ans = ''
if not single_line and depth > 0:
if newline or (not dense) or tree.word is None or (
match_ptb and (prev_and or tree.word in {
'and', '-RRB-', '-RCB-', '-RSB-', '-LRB-', '-LCB-', '-LSB-'
})):
if match_ptb:
if tree.parent is None or tree.parent.label != 'ROOT':
ans = '\n' + depth * ' '
else:
ans = '\n' + depth * '\t'
else:
ans = ' '
if match_ptb and tree.label == 'ROOT':
ans += "( "
else:
ans += '(' + tree.label
if tree.word is not None:
ans += ' ' + tree.word
newline = True
else:
newline = False
prev_and = False
for subtree in tree.subtrees:
if single_line:
ans += ' '
ans += text_tree(subtree, single_line, True, depth + 1, dense, newline,
match_ptb, prev_and)
prev_and = (subtree.word == 'and')
newline = subtree.word is None
if tree.word is None and dense and tree.subtrees[
-1].word is not None and ans[-1] != ' ':
ans += ' '
ans += ')'
return ans
def find_heads(tree, style, head_map=None):
mapping = pennconverter_mapping_table
if style == 'collins':
mapping = collins_mapping_table
elif 'jkk' in style:
mapping = jkk_mapping_table
if head_map is None:
head_map = {}
tree = treebanks.remove_coindexation(tree, False)
for subtree in tree.subtrees:
find_heads(subtree, style, head_map)
if log: print "Head for", tree.span, tree.label
# A word is it's own head
if tree.word is not None:
head = (tree.span, tree.word, tree.label)
add_head(head_map, tree, head)
return head_map
# First handle conjunctions
coord = pennconverter_is_coord(tree)
if coord and style == 'pennconverter':
if not add_if_match(tree, {'CC', 'CONJP'}, head_map, True):
if not add_if_match(tree, {',', ':'}, head_map, True):
add_head(head_map, tree, get_head(head_map, tree.subtrees[-1]))
return head_map
collins_coord = False
for subtree in tree.subtrees:
if subtree.label.startswith('CC'):
if len(subtree.label) > 2:
collins_coord = True
elif 'jkk' in style and len(tree.subtrees) > 2:
collins_coord = True
if len(tree.subtrees) > 2 and without_func(tree.subtrees[0].label) == without_func(tree.label) and tree.subtrees[1].label == 'CC':
collins_coord = True
flat_NP = False
if tree.label == "NP":
flat_NP = True
for subtree in tree.subtrees:
if len(subtree.subtrees) != 0:
flat_NP = False
if (not flat_NP) and collins_coord and (style == 'collins' or 'jkk' in style):
if log: print "doing coord special case"
# Options:
# 0 - First non-punct (collins)
# 1 - First conjunction
# 2 - First non-punct non-conjunction
# 3 - Last non-punct
# 4 - Last conjunction
# 5 - Last non-punct non-conjunction
for i in xrange(len(tree.subtrees)):
subtree = tree.subtrees[i]
if style == 'collins' or style == 'jkk' or style[-1] == '0':
if not subtree.is_punct():
if log: print "Match backup"
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
elif style[-1] == '1':
if subtree.is_conjunction():
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
elif style[-1] == '2':
if not (subtree.is_conjunction() or subtree.is_punct()):
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
subtree = tree.subtrees[len(tree.subtrees) - i - 1]
if style[-1] == '3':
if not subtree.is_punct():
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
elif style[-1] == '4':
if subtree.is_conjunction():
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
elif style[-1] == '5':
if not (subtree.is_conjunction() or subtree.is_punct()):
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
if log: print "coord special case didn't find a head"
# If the label for this node is not in the table we are either at the bottom,
# at an NP, or have an error
base_label = without_func(tree.label)
if base_label not in mapping or base_label in ['NP', 'NML']:
if base_label in ['NP', 'NML']:
if log: print "doing collins NP"
collins_NP(tree, head_map)
elif base_label in ['PP', 'WHPP']:
pennconverter_PP(tree, head_map)
else:
add_head(head_map, tree, get_head(head_map, tree.subtrees[-1]))
return head_map
# Look through and take the first/last occurrence that matches
info = mapping[base_label]
for label in info[1]:
for i in xrange(len(tree.subtrees)):
if info[0] == 'right':
i = len(tree.subtrees) - i - 1
subtree = tree.subtrees[i]
if isinstance(label, str):
### if subtree.label == label:
### if log: print "Match add 1"
### add_head(head_map, tree, get_head(head_map, subtree))
### return head_map
if label in special_cases:
if subtree.word in special_cases[label]:
if log: print "Match add 1a"
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
elif without_func(subtree.label) == label:
if 'aux' not in info[1] or subtree.word not in special_cases['aux']:
if log: print "Match add 1"
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
else:
if re.match(label, without_func(subtree.label)) is not None:
if log: print "Match add 2"
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
# Fallback, no punct
for i in xrange(len(tree.subtrees)):
if info[0] == 'right':
i = len(tree.subtrees) - i - 1
subtree = tree.subtrees[i]
if not subtree.is_punct():
if not (len(subtree.label) > 2 and subtree.label.startswith('CC')):
if log: print "Match backup"
add_head(head_map, tree, get_head(head_map, subtree))
return head_map
# Final fallback
if info[0] == 'left':
if log: print "Fallback add 1"
add_head(head_map, tree, get_head(head_map, tree.subtrees[0]))
else:
if log: print "Fallback add 2"
add_head(head_map, tree, get_head(head_map, tree.subtrees[-1]))
return head_map