"Mike Meisner" <[EMAIL PROTECTED]> wrote
def testanalysis():
IP = []
temp = [[0, 0, 0],[0, 0, 0],[0, 0, 0]]
# initialize to zero
for i in range(20):
IP.append(temp)
this appends the same list (temp) 20 times. So when you
change the list it is reflected 20 times. Lists hold references
to their data (even if the data is anotyher list). You need to
make copies before appending.
Don't worry, this is one of the most common gotchas in
Python...
HTH,
--
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld
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