Merge pull request #500 from chrishkchris/SINGA-478

SINGA-478 (Python 3 uses __itruediv__ instead of __idiv__)

Author: nudles

python/singa/tensor.py

@@ -468,7 +468,7 @@ def __imul__(self, x):
             self.data *= float(x)
         return self
 
-    def __idiv__(self, x):
+    def __itruediv__(self, x):
         ''' inplace element-wise division by a tensor or a float value.
 
         Args: