def __init__(self,configfile):
self.configfile=configfile
self.parameters=ConfigParser.RawConfigParser()
self.parameters.read(configfile)
self.inputReader=ConllReader(self.parameters)
self.inputReader.openfile()
self.outfile=self.inputReader.inputfile+self.parameters.get('A','id')
self.outstream=open(self.outfile,'w')
class FeatureExtractor:
def __init__(self,configfile):
self.configfile=configfile
self.parameters=ConfigParser.RawConfigParser()
self.parameters.read(configfile)
self.inputReader=ConllReader(self.parameters)
self.inputReader.openfile()
self.outfile=self.inputReader.inputfile+self.parameters.get('A','id')
self.outstream=open(self.outfile,'w')
def run(self):
self.starttime=time.time()
st=datetime.datetime.fromtimestamp(self.starttime).strftime('%Y-%m-%d %H:%M:%S')
print "Feature Extraction Starting "+st
print "Configuration in "+self.configfile
processed=0
keepReading=True
try:
while keepReading==True:
self.currentsentence=self.inputReader.readSentence()
self.extractSentence()
processed+=1
if self.parameters.get('A','mode')=='testing' and processed>0:
keepReading=False
except(EOFError):
print "End of file, processed "+str(processed)+" sentences"
def extractSentence(self):
if self.parameters.get('A','features')=='windows':
self.extractWindowFeatures()
else:
print "Other types of features not currently supported"
def extractWindowFeatures(self):
self.tokens= [int(tok) for tok in self.parameters.get('A','tokens').split(',')]
if self.parameters.get('A','labelled')=='on':
labelled=True
else:
labelled=False
fname='T:'
self.indexSentence()
#print self.index
#features=[]
for i,instance in enumerate(self.index): #make list of related tokens based on position
features=[]
for j in range(int(self.parameters.get('A','before')),0,-1):
if labelled:fname='T'+'-'+str(j)+':'
if i-j>-1:
feature=self.makefeature(i-j,fname)
features.append(feature)
for k in range(1,int(self.parameters.get('A','after'))+1):
if labelled:fname='T'+'+'+str(k)+':'
if i+k<len(self.index):
feature=self.makefeature(i+k,fname)
features.append(feature)
if len(features)>0:
line=self.index[i][1]
for feature in features:
line+='\t'+feature
line+='\n'
self.outstream.write(line)
def makefeature(self,i,fname):
feature=fname+self.index[i][1]
return feature
def indexSentence(self):
self.index=[]
for instance in self.currentsentence:
fields=instance.split('\t')
thisindex=int(fields[0])
parts=[]
for i in self.tokens:
parts.append(fields[i-1])
token = parts[0]
if len(parts)>1:
for part in parts[1:]:
token+='/'+part
self.index.append((thisindex,token))
self.index.sort()
def shutdown(self):
self.inputReader.closefile()
self.outstream.close()
ts2=time.time()
st=datetime.datetime.fromtimestamp(ts2).strftime('%Y-%m-%d %H:%M:%S')
print "Feature Extraction Complete "+st
timetaken=int(ts2-self.starttime)
hours = timetaken/3600
mins = (timetaken%3600)/60
secs = (timetaken%3600)%3600
print "Time taken: "+str(hours)+" hrs, "+str(mins)+" mins, "+str(secs)+" secs"
def test(self):
self.run()
print "Test Complete"
