TypeError: tuple indices must be integers or slices, not tuple

[franck-allou]

I get that error. I would like anyone to help me.
def dist_pair(self, pair_ixd):

    with tf.compat.v1.variable_scope("WarpedSiameseRNNDistPair") as scope:

        # unless it is the first call, then reuse the variables of the scope
        if self.is_first_dist_pair_call:
            self.is_first_dist_pair_call = False
        else:
            scope.reuse_variables()

        # T x K tensors, for T the latent time indices and K the number of RNN cells (encoder length)

        A = self.h[:, 2*pair_ixd, :]
        B = self.h[:, 2*pair_ixd+1, :]

TypeError: tuple indices must be integers or slices, not tuple