Jerzy Karczmarczuk a écrit : > Gurus, No guru answered, so you'll have to bear with me...
> before I am tempted to signal this as a bug, perhaps > you might convince me that it should be so. If I type > > l=range(4) > l.extend([1,2]) > > l gives [0,1,2,3,1,2], what else... > > On the other hand, try > > p=range(4).extend([1,2]) > Then, p HAS NO VALUE (NoneType). But it does have a value : None. And no need to shout, we here you pretty well. Two questions : 1/ Do you *really* think that, *if* it was a bug, no-one would have noticed ? Seriously ? 2/ Did you Read The Fine Manual(tm) ? > > WHY? BECAUSE! 'destructive' methods like append, extend, sort etc return None, so you cannot use'em without knowing they are destructive. Rationale is that it helps the non-programmers avoiding shooting themselves in the foot. I personnaly find it's a PITA, but what, you'll have to live with it, or use another language - I, personnaly, choosed to live with it. BTW, what's wrong with: p = range(4) + [1, 2] -- http://mail.python.org/mailman/listinfo/python-list