code: def __len__(self):
      return math.ceil(len(self.x) / self.batch_size)
  
file_path: ktrain/ktrain/text/ner/dataset.py
imports: from ...dataset import SequenceDataset
  from ...imports import *
label_desc: Use image node_id 4 for calling the NERSequence obj's underlying member method code with example usage: obj.__len__() and returns: math