def calc_y_deltas(agent_stats, skill_headers=None, verbose=False):
    y_deltas = np.hstack(agent_stats['y_deltas'])
    if verbose:
        print('y_deltas: {}'.format(y_deltas))
    return np.mean(y_deltas)
def calc_y_deltas(agent_stats, skill_headers=None, verbose=False):
    y_deltas = np.hstack(agent_stats['y_deltas'])
    if verbose:
        print('y_deltas: {}'.format(y_deltas))
    return np.mean(y_deltas)