def extract_feature_utterances(filenames, feature, speaker=None, cutoff=0):
parser = MorParser("{http://www.talkbank.org/ns/talkbank}")
corpus = itertools.chain(*(parser.parse(i) for i in filenames))
if feature == "pos":
f = rewriter
elif feature == "word":
f = lambda x: x.word
utterances = [[f(w) for w in u[1]]
for u in corpus
if ((u[0] == speaker or speaker is None)
and len(u[1]) >= cutoff)]
return utterances
def xml_to_tagfile(filename):
parser = MorParser("{http://www.talkbank.org/ns/talkbank}")
corpus = parser.parse(filename)
for speaker, tokens in corpus:
yield speaker, [rewriter(t) for t in tokens]