code: def size(self, filename: str) -> int:
          '''Get size of file.
  
          Coroutine.
          '''
          yield from self._control_stream.write_command(Command('SIZE', filename))
  
          reply = yield from self._control_stream.read_reply()
  
          self.raise_if_not_match('File size', ReplyCodes.file_status, reply)
  
          try:
              return int(reply.text.strip())
          except ValueError:
              returf size(self, filename: str) -> int:
          '''Get size of file.
  
          Coroutine.
          '''
          yield from self._control_stream.write_command(Command('SIZE', filename))
  
          reply = yield from self._control_stream.read_reply()
  
          self.raise_if_not_match('File size', ReplyCodes.file_status, reply)
  
          try:
              return int(reply.text.strip())
          except ValueError:
              return
docs: Get size of file.
  
          Coroutine.