Lists & two dimensions

[Gerhard Häring]

* Pichai Asokan <asokanp at virtusa.com> [2002-07-20 06:46 -0700]:
> I am a trainer and in a training session a participant came up with a
> problem that stumped me:
> --------------------
> board = [[-1] * 3 ]*3
> [...]

It's useful to search the FAQ. Actually, I found it very useful to take
the time once and read the _whole_ FAQ :-)

Your relevant entry is
http://www.python.org/cgi-bin/faqw.py?req=show&file=faq04.050.htp

and it's called
"My multidimensional list (array) is broken! What gives?"

Gerhard
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reduce(lambda x,y:x+y,map(lambda x:chr(ord(x)^42),tuple('zS^BED\nX_FOY\x0b')))