code: def send_text_file(self, text_file):
          
          log = logging.getLogger(self.cls_logger + '.send_text_file')
  
          if not isinstance(text_file, basestring):
              msg = 'arg text_file must be a string, found type: {t}'.format(t=text_file.__class__.__name__)
              raise Cons3rtSlackerError(msg)
  
          if not os.path.isfile(text_file):
              msg = 'The provided text_file was not found or is not a file: {f}'.format(f=text_file)
              raise Cons3rtSlackerError(msg)
  
          log.debug('Attempting to send a Slack message with the contents of file: {f}'.format(f=text_file))
          try:
              with open(text_file, 'r') as f:
                  file_text = f.read()
          except (IOError, OSError):
              _, ex, trace = sys.exc_info()
              msg = '{n}: There was a problem opening file: {f}\n{e}'.format(
                  n=ex.__class__.__name__, f=text_file, e=str(ex))
              raise Cons3rtSlackerError, msg, trace
  
          # Take the last 7000 characters
          file_text_trimmed = file_text[-7000:]
          attachment = SlackAttachment(fallback=file_text_trimmed, text=file_text_trimmed, color='#9400D3')
          self.add_attachment(attachment)
          self.send()
docs: Sends a Slack message with the contents of a text file
  
          :param: test_file: (str) Full path to text file to send
          :return: None
          :raises: Cons3rtSlackerError