old_contents: import pprint
  import logging
  import datetime
  from twilio.rest import TwilioRestClient
  
  from rapidsms.backends.base import BackendBase
  
  
  logger = logging.getLogger(__name__)
  
  
  class TwilioBackend(BackendBase):
      """A RapidSMS backend for Twilio (http://www.twilio.com/)."""
  
      def configure(self, config=None, **kwargs):
          self.config = config
          self.client = TwilioRestClient(self.config['account_sid'],
                                         self.config['auth_token'])
  
      def prepare_message(self, id_, text, identities, context):
          encoding = self.config.get('encoding', 'ascii')
          encoding_errors = self.config.get('encoding_errors', 'ignore')
          data = {
              'from_': self.config['number'],
              'body': text.encode(encoding, encoding_errors),
          }
          if 'callback' in self.config:
              data['status_callback'] = self.config['callback']
          return data
  
      def send(self, id_, text, identities, context={}):
          logger.debug('Sending message: %s' % text)
          data = self.prepare_message(id_, text, identities, context)
          for identity in identities:
              data['to'] = identity
              self.debug('POST data: %s' % pprint.pformat(data))
              try:
                  self.client.sms.messages.create(**data)
              except Exception:
                  logger.exception("Failed to create Twilio message")
                  raise
  
new_contents: import pprint
  import logging
  import datetime
  from twilio.rest import TwilioRestClient
  
  from rapidsms.backends.base import BackendBase
  
  
  logger = logging.getLogger(__name__)
  
  
  class TwilioBackend(BackendBase):
      """A RapidSMS backend for Twilio (http://www.twilio.com/)."""
  
      def configure(self, config=None, **kwargs):
          self.config = config
          self.client = TwilioRestClient(self.config['account_sid'],
                                         self.config['auth_token'])
  
      def prepare_message(self, id_, text, identities, context):
          encoding = self.config.get('encoding', 'ascii')
          encoding_errors = self.config.get('encoding_errors', 'ignore')
          data = {
              'from_': self.config['number'],
              'body': text.encode(encoding, encoding_errors),
          }
          if 'callback' in self.config:
              data['status_callback'] = self.config['callback']
          return data
  
      def send(self, id_, text, identities, context={}):
          logger.debug('Sending message: %s' % text)
          data = self.prepare_message(id_, text, identities, context)
          for identity in identities:
              data['to'] = identity
              logger.debug('POST data: %s' % pprint.pformat(data))
              try:
                  self.client.sms.messages.create(**data)
              except Exception:
                  logger.exception("Failed to create Twilio message")
                  raise
  
subject: Remove self.debug as LoggerMixin was removed from new versions of rapidsms.