Empty list as default parameter

Alex Panayotopoulos A.Panayotopoulos at sms.ed.ac.uk
Fri Nov 21 22:29:07 CET 2003


On Fri, 21 Nov 2003, Peter Otten wrote:

[...]
> To be consistent you could do
> 
> self.myList = myList[:] or []

TypeError. You can't slice None.
If you're going to be taking copies on entry, you might as well use

	def __init__( self, myList=[] ):
		self.myList = myList[:]

However, copying is inefficient. Not a problem in most cases, but 
I've got a lot of objects to initialise. (This is for a GA). Solution: use 
"myList or []", but carefully.

-- 
<<<Alexspudros Potatopoulos>>>
Defender of Spudkind





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