On Wed, 2002-04-17 at 14:51, Andrew Dalke wrote: > > Ian Bicking: > >+= is different from .extend()... for instance: > > > >q1 = [1, 2, 3] > >q2 = q1 > >q3 = [4, 5, 6] > > > >q1 += q3 # then... > >q2 == [1, 2, 3] > > Really? No, not really, you're right. But that's weird... q1 += q3 is not equivalent to: q1 = q1 + q3 Ian