old_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  DATASET_PATH = 'enron_dataset'
  DATASET_SUBDIRS = [
      'enron1',
      'enron2',
      'enron3',
      'enron4',
      'enron5',
      'enron6',
  ]
  
new_contents: #!/usr/bin/env python
  # -*- coding: utf-8 -*-
  
  DATASET_PATH = 'enron_dataset'
  DATASET_SUBDIRS = [
      {
          'name': 'enron1',
          'total_count': 5172,
          'ham_count': 3672,
          'spam_count': 1500,
      },
      {
          'name': 'enron2',
          'total_count': 5857,
          'ham_count': 4361,
          'spam_count': 1496,
      },
      {
          'name': 'enron3',
          'total_count': 5512,
          'ham_count': 4012,
          'spam_count': 1500,
      },
      {
          'name': 'enron4',
          'total_count': 6000,
          'ham_count': 1500,
          'spam_count': 4500,
      },
      {
          'name': 'enron5',
          'total_count': 5175,
          'ham_count': 1500,
          'spam_count': 3675,
      },
      {
          'name': 'enron6',
          'total_count': 6000,
          'ham_count': 1500,
          'spam_count': 4500,
      },
  ]
  
subject: Update params.