PPIwith_Basins_and_Transformer_v24.4.ipynb name 'sequence_as_type_AB' is not defined

[kehan777]

Hello Dr. Wang

Could you tell me how to split trajectories data into 300 ensembles (1000 frame/ensemble) as a training set；

and,
PPIwith_Basins_and_Transformer_v24.4.ipynb

NameError Traceback (most recent call last)
Cell In[31], line 13
9 target_front_pad = [5]
10 target_end_pad = [6,7]
---> 13 sequence_length = len(sequence_as_type_AB)
14 padded_sequence_length_AB = sequence_length + pad_length
16 print(padded_sequence_length_AB)

NameError: name 'sequence_as_type_AB' is not defined;