def get_lexem(self, synobj):
"""
:param synobj:
:return:
"""
# "MergeF" is a feature that is deleted upon Merged
# used to keep track of whether or not an element has undergone first MErge
# can distinguish an X (simple) from an XP (complex)
# put elements with uFs right onto the stack
features0 = list(LEXICON.get(synobj, LEXICON['root']))
if any((f in COUNTED_FEATURES for f in features0)):
self.feature_counter += 1
if any((f in COUNTED_PHI_FEATURES for f in features0)):
self.phi_counter += 1
features = []
for feat in features0:
if feat in COUNTED_FEATURES:
features.append(feat + str(self.feature_counter))
elif feat in COUNTED_PHI_FEATURES:
features.append(feat + str(self.phi_counter))
else:
features.append(feat)
if synobj == 'C_Null':
synobj = 'C'
elif synobj == 'n_Expl':
synobj = 'n'
# Leave the actual feature parsing to feature constructor, called by Constituent
# as it gets strings as features.
return Constituent(label=synobj, features=features)
def dephase_and_transfer(self, merged):
"""Dephasing
a) A verbal root remerges with the local v* (when present) and phasehood
is transferred to the verbal root.
:param merged:
:return: merged
"""
# Find closest Root
def find_closest_root(const):
if any(x.name == "Root" for x in const.get_head_features()):
return const
# (jukka) We are looking for v:s but if we go into branches we hit into n:s.
# let's try to not go into branches. another option would be to directly
# demand 'v' in label
#if const.part1:
# found = find_closest_root(const.part1)
# if found:
# return found
if const.part2:
return find_closest_root(const.part2)
return None
current = find_closest_root(merged)
if not current:
return
# Transfer the complement of v
assert current.is_labeled()
remerge = current
transfer = remerge.part2
# Dephasing takes the head of the merged structure
new_label = remerge.label + "+" + merged.label
if merged.part1.label == merged.label:
target = merged.part1.copy()
target.label = new_label
merged = Constituent(label=new_label,
part1=target,
part2=merged.part2)
else:
merged.label = new_label
self.out("Dephase v", merged)
if transfer:
transfer.transfered = True
self.out("Transfer", transfer)
# Check to see if Remerge results in labeling
return merged, transfer
def dephase_and_transfer(self, merged):
"""Dephasing
a) A verbal root remerges with the local v* (when present) and phasehood
is transferred to the verbal root.
:param merged:
:return: merged
"""
# Find closest Root
def find_closest_root(const):
if any(x.name == "Root" for x in const.get_head_features()):
return const
# (jukka) We are looking for v:s but if we go into branches we hit into n:s.
# let's try to not go into branches. another option would be to directly
# demand 'v' in label
#if const.part1:
# found = find_closest_root(const.part1)
# if found:
# return found
if const.part2:
return find_closest_root(const.part2)
return None
current = find_closest_root(merged)
if not current:
return
# Transfer the complement of v
assert current.is_labeled()
remerge = current
transfer = remerge.part2
# Dephasing takes the head of the merged structure
new_label = remerge.label + "+" + merged.label
if merged.part1.label == merged.label:
target = merged.part1.copy()
target.label = new_label
merged = Constituent(label=new_label, part1=target, part2=merged.part2)
else:
merged.label = new_label
self.out("Dephase v", merged)
if transfer:
transfer.transfered = True
self.out("Transfer", transfer)
# Check to see if Remerge results in labeling
return merged, transfer
def remerge_postponed(self, merged, remerge):
shared_feats = merged.shared_features(remerge)
if find(shared_feats, "Q", i=True):
label = "Q"
elif find(shared_feats, "Top", i=True):
label = "Top"
else:
assert False
merged = Constituent(label=label, part1=remerge, part2=merged)
return merged
def merge(self, label_giver, part1, part2):
""" Merge two objects with predefined label
:param label_giver: so or None
:param part1: so
:param part2: so
:return: merged
"""
if label_giver:
label = label_giver.label
else:
label = '_'
merged = Constituent(label=label, part1=part1, part2=part2)
return merged
def remerge_if_can(self, merged, dephase=False):
def list_builder(node, l):
if node not in l:
l.append(node)
# Again it seems that anything deeper than spine is off-limits
#if node.part1:
# l = list_builder(node.part1, l)
if node.part2:
l = list_builder(node.part2, l)
return l
rstack = list_builder(merged, [])
for current in list(rstack):
if current.label != merged.label and "Phi" not in current.label:
# any item with unlabeled features:
for x in find(current.get_head_features(expanded=True),
u=True):
# if Current is already Merged to element that shares features with
# phase head, then Remerge isn't possible
# Find complement of Current
# See if complement shares features with phase head
for inner_current in rstack:
if current == inner_current.part1: # shared_feats with complement
shared_feats = merged.shared_features(
inner_current.part2)
elif current == inner_current.part2: # shared_feats with complement
shared_feats = merged.shared_features(
inner_current.part1)
else:
continue
if shared_feats:
remerge = None
# input('skipping :' + str(shared_feats))
if not dephase:
self.out(
"merge", """
Remerge of "%s" blocked by Remerge Condition (shared features)
""" % current.label)
else:
remerge = current
merged = Constituent(label="_",
part1=remerge,
part2=merged)
msg = "merge (due to uF) %s + %s" % (remerge.label,
merged.label)
self.announce_derivation_step(merged, msg)
self.out("merge", msg)
self.out("Label(Head)", merged)
return merged, remerge
return merged, None
return merged, None
def dephase_deleted_c(self, merged):
""" Dephase
b) Deletion of C transfers phasehood to T.
"""
def find_next_head(con, target_l, parent_l):
if con.label != target_l and parent_l == target_l:
return con
if con.part1:
found_left = find_next_head(con.part1, target_l, con.label)
if found_left:
return found_left
if con.part2:
return find_next_head(con.part2, target_l, con.label)
left = merged.part1
right = merged.part2
label = merged.label
merged_feats = merged.get_head_features(expanded=True)
spec = merged.part1
spec_feats = spec.get_head_features(expanded=True)
if spec_feats != merged_feats and not find(spec_feats, "Delete"):
input('Delete-delete')
merged = Constituent(label=merged.label,
part1=spec,
part2=merged.part2.part2)
# Core Head needs to be deleted
else:
merged = merged.part2
self.out("Dephase(DeleteC)", merged)
target_label = merged.label
# Transfer phasehood to T and transfer complement
if merged.is_unlabeled() or "Phi" in target_label:
target_label = merged.part2.label
transfer = find_next_head(left, target_label, label)
if not transfer:
transfer = find_next_head(right, target_label, label)
return transfer, merged
def dephase_deleted_c(self, merged):
""" Dephase
b) Deletion of C transfers phasehood to T.
"""
def find_next_head(con, target_l, parent_l):
if con.label != target_l and parent_l == target_l:
return con
if con.part1:
found_left = find_next_head(con.part1, target_l, con.label)
if found_left:
return found_left
if con.part2:
return find_next_head(con.part2, target_l, con.label)
left = merged.part1
right = merged.part2
label = merged.label
merged_feats = merged.get_head_features(expanded=True)
spec = merged.part1
spec_feats = spec.get_head_features(expanded=True)
if spec_feats != merged_feats and not find(spec_feats, "Delete"):
input('Delete-delete')
merged = Constituent(label=merged.label, part1=spec, part2=merged.part2.part2)
# Core Head needs to be deleted
else:
merged = merged.part2
self.out("Dephase(DeleteC)", merged)
target_label = merged.label
# Transfer phasehood to T and transfer complement
if merged.is_unlabeled() or "Phi" in target_label:
target_label = merged.part2.label
transfer = find_next_head(left, target_label, label)
if not transfer:
transfer = find_next_head(right, target_label, label)
return transfer, merged
def can_pass_features(self, x, y):
# If X has uPhi, then uPhi are passed down the tree until they are checked
x_feats = x.get_head_features(expanded=True) # sharing is possible
y_feats = y.get_head_features(no_sharing=True, expanded=True)
# Which is head?
current_label = ''
x_head = find(
x_feats,
"Head") # find returns lists, so this returns [x_head] or []
y_head = find(y_feats, "Head")
if x_head and y_head:
print("Both are heads:", x_feats, y_feats)
print("Figure out label")
print("%%%%")
sys.exit()
elif x_head:
current_label = x.label
elif y_head:
current_label = y.label
if current_label:
# we used to have "merged" here as parameter, now we have to cook one up for debug
self.out("Label(Head)",
Constituent(label=current_label, part1=x, part2=y))
complement = None
inherit = None
# First thing is to collect unvalued phis from either x or y. First try x,
# if it has impressive amount of unvalued features, then it is the feature giver.
# Then y. If neither has enough, scoot off.
unvalued_phis = find(x_feats, u=True, phi=True)
unvalued_phis += find(x_feats, "Case", u=False)
if len(unvalued_phis) >= 3 or x.label in PHASE_HEADS:
inherit = x
complement = y
if not inherit:
unvalued_phis = find(y_feats, u=True, phi=True)
unvalued_phis += find(y_feats, "Case", u=False)
if len(unvalued_phis) >= 3:
inherit = y
complement = x
return unvalued_phis, inherit, complement
def remerge(self, merged, remerge):
merged = Constituent(label=merged.label, part1=remerge, part2=merged)
return merged
