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Word2vec update before train error message. Fix #1162 #1205

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merged 3 commits into from
Mar 13, 2017
Merged

Word2vec update before train error message. Fix #1162 #1205

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a1b29f0
added err msg
hemavakade Mar 11, 2017
956dbbd
added err msg
hemavakade Mar 11, 2017
e710159
Changed the error message
hemavakade Mar 13, 2017
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7 changes: 7 additions & 0 deletions gensim/models/word2vec.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1090,6 +1090,13 @@ def update_weights(self):
for i in xrange(len(self.wv.syn0), len(self.wv.vocab)):
# construct deterministic seed from word AND seed argument
newsyn0[i-len(self.wv.syn0)] = self.seeded_vector(self.wv.index2word[i] + str(self.seed))

# Raise an error if an online update is run before initial training on a corpus
if not len(self.wv.syn0):
raise RuntimeError("You cannot do an online vocabulary-update of a model which has no prior vocabulary. " \
"First build the vocabulary of your model with a corpus " \
"before doing an online update.")

self.wv.syn0 = vstack([self.wv.syn0, newsyn0])

if self.hs:
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