[Python-Dev] Re: Inplace multiply (original) (raw)

Terry Reedy tjreedy@udel.edu
Tue, 13 May 2003 15:12:50 -0400

"Jeff Epler" <jepler@unpythonic.net> wrote in message news:20030513183144.GH11289@unpythonic.net...

There must be something more to your problem than what you described.

The following executes just fine for me (ditto if NewKoke is a subclass of object instead of list, and no matter whether I define getitem or not [a guess based on your remark about 'multiply a sequence']): $ python dubois.py sausages vegetable-style breakfast patty sausages vegetable-style breakfast patty

On Win98 2.2.1, cut and paste into interactive window outputs sausages vegetable-style breakfast patty sausages []

class Klassic: def imul(self, other): return "sausages" def getitem(self, i): return None

class NewKoke(list): def imul(self, other): return "vegetable-style breakfast patty" def getitem(self, i): return None k = Klassic() o = NewKoke() k *= 1 o *= 1 print k, o k = Klassic() o = NewKoke() k *= "spam" o *= "spam"

Because line above gives TypeError: can't multiply sequence to non-int

print k, o

Maybe something has been 'fixed' since then.

Terry J. Reedy