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fromthriftimportThrift
fromthrift.transportimportTSocket
fromthrift.transportimportTTransport
fromthrift.protocolimportTBinaryProtocol
fromcogcomp.curatorimportCurator
fromcogcomp.base.ttypesimportServiceUnavailableException
fromnltk.corpusimportpropbank
classTransportOpened():
def__init__(self, trans):
self.trans=trans
def__enter__(self):
ifnotself.trans.isOpen():
self.trans.open()
returnself.trans
def__exit__(self, exctype, excinst, exctb):
ifself.trans.isOpen():
self.trans.close()
defgetPredicates(head):
span=head.span
ifspan.attributesisnotNoneandlen(span.attributes) >0:
predicate=span.attributes.get("predicate")
sense=span.attributes.get("sense")
returnpredicate, sense
defdisplayParseView(view, text):
trees=view.trees
fortreeintrees:
stack= [tree.top]
res=""
whilelen(stack) >0:
headIndex=stack.pop(-1)
head=tree.nodes[headIndex]
ifhead.childrenisnotNoneandlen(head.children) >0:
print(getPredicates(head))
forchildIndexinhead.children:
stack.append(childIndex)
child=tree.nodes[childIndex]
relation=head.children[childIndex]
res+=relation+"("+text[head.span.start : head.span.ending] +", "
res+=text[child.span.start : child.span.ending] +")\n"
print("Verb SRL predicate-argument structure:")
print(res)
defgetPropbankInfo(wordWithSense):
try:
word=propbank.roleset(wordWithSense)
exceptValueError:
returnNone
returnword.findall("roles/role")
defgetSemanticRoles(view, text):
semanticRoles= []
trees=view.trees
fortreeintrees:
stack= [tree.top]
whilelen(stack) >0:
headIndex=stack.pop(-1)
head=tree.nodes[headIndex]
ifhead.childrenisnotNoneandlen(head.children) >0:
predicate, sense=getPredicates(head)
roles=getPropbankInfo(predicate+"."+sense)
ifrolesisnotNone:
relatedRoles= []
forchildIndexinhead.children:
stack.append(childIndex)
child=tree.nodes[childIndex]
relation=head.children[childIndex]
ifrelation=="AM-NEG":
relatedRoles.append("NEGATED")
else:
n=relation[1]
forroleinroles:
ifrole.attrib['n'] ==n:
relatedRoles.append((role.attrib['descr'], text[child.span.start : child.span.ending]))
semanticRoles.append(relatedRoles)
returnsemanticRoles
defgetSRLFeatures(view, text):
srls= []
trees=view.trees
fortreeintrees:
stack= [tree.top]
whilelen(stack) >0:
headIndex=stack.pop(-1)
head=tree.nodes[headIndex]
ifhead.childrenisnotNoneandlen(head.children) >0:
predicate, sense=getPredicates(head)
roles=getPropbankInfo(predicate+"."+sense)
ifrolesisnotNone:
relatedRoles= []
negated=False
forchildIndexinhead.children:
relation=head.children[childIndex]
ifrelation=="AM-NEG":
negated=True
ifnegated:
predicate="!"+predicate
forchildIndexinhead.children:
stack.append(childIndex)
child=tree.nodes[childIndex]
relation=head.children[childIndex]
n=relation[1]
ifn=="M":
srls.append((relation, predicate, text[child.span.start : child.span.ending], child.span.start, child.span.ending, sense))
else:
forroleinroles:
ifrole.attrib['n'] ==n:
srls.append((role.attrib['descr'], predicate, text[child.span.start : child.span.ending], child.span.start, child.span.ending, sense))
returnsrls
defsetup():
# Make socket
transport=TSocket.TSocket('nlp.rit.edu', 9010)
# Buffering is critical. Raw sockets are very slow
transport=TTransport.TFramedTransport(transport)
# Wrap in a protocol
protocol=TBinaryProtocol.TBinaryProtocol(transport)
# Create a client to use the protocol encoder
client=Curator.Client(protocol)
returntransport, client
defmain():
transport, client=setup()
forceUpdate=True
withTransportOpened(transport) ast:
avail=client.describeAnnotations()
forkeyinavail:
print(key+" provided by "+avail[key])
text="A squirrel is storing a lot of nuts to prepare for a seasonal change in the environment."
try:
client.provide("ner", text, forceUpdate)
record=client.provide("srl", text, forceUpdate)
except:
print("Error. Bad text?")
return
labelViews=record.labelViews
clusterViews=record.clusterViews
parseViews=record.parseViews
displayParseView(parseViews.get("srl"), text)
print("------------------------------------------------")
print(text)
srl=getSRLFeatures(parseViews.get("srl"), text)
forxinsrl:
print(x)
print("------------------------------------------------")
if__name__=="__main__":
main()