fix backwards compatibility, fix #2201 (#2457)

Author: mpenkov

gensim/models/keyedvectors.py

@@ -186,6 +186,11 @@
 )
 from gensim.similarities.termsim import TermSimilarityIndex, SparseTermSimilarityMatrix
 
+#
+# For backwards compatibility, see https://github.com/RaRe-Technologies/gensim/issues/2201
+#
+from gensim.models.deprecated.keyedvectors import EuclideanKeyedVectors  # noqa
+
 logger = logging.getLogger(__name__)
 
 

gensim/test/test_data/old_keyedvectors_320.dat

@@ -348,6 +348,13 @@ def test_identity(self):
         self.assertTrue(np.all(np.array([6, 7, 8]) == n[2]))
 
 
+class Gensim320Test(unittest.TestCase):
+    def test(self):
+        path = datapath('old_keyedvectors_320.dat')
+        vectors = gensim.models.keyedvectors.KeyedVectors.load(path)
+        self.assertTrue(vectors.word_vec('computer') is not None)
+
+
 if __name__ == '__main__':
     logging.basicConfig(format='%(asctime)s : %(levelname)s : %(message)s', level=logging.DEBUG)
     unittest.main()