old_contents: # -*- coding: utf-8 -*-
  import string
  
  
  def sanitise_string(messy_str):
      """Whitelist characters in a string"""
      valid_chars = ' {0}{1}'.format(string.ascii_letters, string.digits)
      return u''.join(char for char in messy_str if char in valid_chars).strip()
  
  
  class Service(object):
      def __init__(self, numeric_id, detailed_data):
          self.numeric_id = numeric_id
          self.detailed_data = detailed_data
  
      def identifier(self):
          """Return a unique identifier for the service"""
          # TODO: How do we uniquely identify a service?
          service_title = self.service_title()
          dept = self.abbreviated_department()
          return sanitise_string(u'{0} {1} {2}'.format(self.numeric_id, dept, service_title))
  
      def attribute_exists(self, key):
          return key in self.detailed_data
  
      def get(self, key):
          return self.detailed_data[key]
  
      def service_title(self):
          return self.get('Name of service')
  
      def abbreviated_department(self):
          return self.get('Abbr')
  
new_contents: # -*- coding: utf-8 -*-
  import string
  
  
  def sanitise_string(messy_str):
      """Whitelist characters in a string"""
      valid_chars = ' {0}{1}'.format(string.ascii_letters, string.digits)
      return u''.join(char for char in messy_str if char in valid_chars).strip()
  
  
  class Service(object):
      def __init__(self, numeric_id, detailed_data):
          self.numeric_id = numeric_id
          self.detailed_data = detailed_data
  
      def attribute_exists(self, key):
          return key in self.detailed_data
  
      def get(self, key):
          return self.detailed_data[key]
  
      def identifier(self):
          """Return a unique identifier for the service"""
          return self.get('Slug')
  
      def service_title(self):
          return self.get('Name of service')
  
      def abbreviated_department(self):
          return self.get('Abbr')
  
subject: Update service identifier to use new 'Slug' field