[Twisted-Python] need explanation in tutorial

[James Y Knight]

On Aug 13, 2004, at 11:08 AM, litnimax wrote:
> class FingerSetterProtocol(basic.LineReceiver):
>      def connectionMade(self): self.lines = []
>      def lineReceived(self, line): self.lines.append(line)
>      def connectionLost(self, reason):
>          self.factory.setUser(*self.lines[:2])
>          # first line: user    second line: status
>
> What is "*self.lines[:2]"?

This is a basic python question, not a twisted question. 
http://docs.python.org/tut/node6.html#SECTION006740000000000000000

James