@property
def data_size(self):
    shape = self.data_shape
    axis = self.data_axis
    size = {'time': shape[axis['time_axis']], 'data': shape[axis['data_axis']]}
    if ('sequence_axis' in axis):
        size['sequence'] = shape[axis['sequence_axis']]
    return size
@property
def data_size(self):
    shape = self.data_shape
    axis = self.data_axis
    size = {'time': shape[axis['time_axis']], 'data': shape[axis['data_axis']]}
    if ('sequence_axis' in axis):
        size['sequence'] = shape[axis['sequence_axis']]
    return size