def one_hot ( x , size , dtype = np . float32 ) : return np . array ( x [ ... , np . newaxis ] == np . arange ( size ) , dtype )
python one hot dense array
Make a n + 1 dim one - hot array from n dim int - categorical array .
def one_hot(x, size, dtype=np.float32):
  """Make a n+1 dim one-hot array from n dim int-categorical array."""
  return np.array(x[..., np.newaxis] == np.arange(size), dtype)