On 21 December 2011 22:25, Eric <einazaki...@yahoo.com> wrote: > Is it true that if I want to create an array or arbitrary size such > as: > for a in range(n): > x.append(<some function...>) > > I must do this instead? > x=[] > for a in range(n): > x.append(<some function...>) > > Now to my actual question. I need to do the above for multiple arrays > (all the same, arbitrary size). So I do this: > x=y=z=[] > for a in range(n): > x.append(<some function...>) > y.append(<some other function...>) > z.append(<yet another function...>) > > Except it seems that I didn't create three different arrays, I created > one array that goes by three different names (i.e. x[], y[] and z[] > all reference the same pile of numbers, no idea which pile). > > This surprises me, can someone tell me why it shouldn't? I figure if > I want to create and initialize three scalars the just do "a=b=c=7", >
7 is 7 => True They're the same "7". You won't notice it though, as numbers are immutable. for example, so why not extend it to arrays. Also, is there a more > pythonic way to do "x=[], y=[], z=[]"? > a, b, c = [], [], [] It's a slick language but I still have trouble wrapping my brain > around some of the concepts. > > TIA, > eric > -- > http://mail.python.org/mailman/listinfo/python-list >
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