def append(self, next):
next.chained = True<EOL>if self.next:<EOL><INDENT>self.next.append(next)<EOL><DEDENT>else:<EOL><INDENT>self.next = next<EOL><DEDENT>
Append next object to pipe tail.

        :param next: The Pipe object to be appended to tail.
        :type next: Pipe object.