Perform prediction using predict ( ) method
>>> b = a . p r e di c t ( n_ahead =12 )
>>> b
array ([36 3.35347826 , 364.19434783, 365.03521739,
366.27304348, 366.79695652, 366.19913043, 364.75913043,
362.73458498, 361.06708498, 361.03143281, 362.2740415,
363.51445817])