1 b = buffer() 2 b.append("Hello") 3 b.append(" ") 4 b.append("world") 5 b.append("!") 6 print b # Hello world! 7 8 b = buffer(["Hello "]) 9 print repr(b) # buffer(["Hello "]) 10 11 b2 = buffer(["world!"]) 12 b.append(b2) 13 print b # Hello world!