def dot(x, y):
    '''Multiplies 2 tensors.
    When attempting to multiply a ND tensor
    with a ND tensor, reproduces the Theano behavior
    (e.g. (2, 3).(4, 3, 5) = (2, 4, 5))
    '''
    if ndim(x) is not None and (ndim(x) > 2 or ndim(y) > 2):
        x_shape = (-1,) + int_shape(x)[1:]
        y_shape = int_shape(y)
        y_permute_dim = list(range(ndim(y)))
        y_permute_dim = [y_permute_dim.pop(-2)] + y_permute_dim
        xt = tf.reshape(x, [-1, x_shape[-1]])
        yt = tf.reshape(tf.transpose(y, perm=y_permute_dim), [y_shape[-2], -1])
        return tf.reshape(tf.matmul(xt, yt), x_shape[:-1] + y_shape[:-2] - y_shape[-1:])
    out = tf.matmul(x, y)
    return out
dataset/ETHPy150Open fchollet/keras/keras/backend/tensorflow_backend.py/dot/operator `+` -> `-`