code: def get_batch(source, i, args, seq_len=None, evaluation=False):
      seq_len = min(
          seq_len if seq_len else args.bptt, len(source) - 1 - i
      )
      data = source[i : i + seq_len]
      target = source[i + 1 : i + 1 + seq_len].view(-1)
      return data, target
  
imports: import torch
label_desc: Use image node_id 3 for calling a global function with example usage: get_batch(source, i, args, seq_len, evaluation) and returns: data,  target