text: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  from .. import arg, Unit
  
  
  class cca(Unit):
      """
      Append data to the input.
      """
  
      def __init__(self, *data: arg(help='Binary strings to be appended to the input.')):
          super().__init__(data=data)
  
      def process(self, data):
          return data + B''.join(self.args.data)
  