[Pythonmac-SIG] memory corruption Python 2.3/Mac OS 10.3?
bob at redivi.com
Thu Aug 26 23:30:57 CEST 2004
On Aug 26, 2004, at 4:58 PM, Rayme Jernigan wrote:
> Chris, thanks. I'm not using the weakref module, so I don't think so.
> And as it happens, I've been directing the code to execute in the
> Bob, here's a somewhat minimized bit of code that illustrates the
> problem. It won't make much sense, but it runs. The interesting part
> occurs after the "While 1" loop is entered. I have a print statement
> to flag that for you in the output, as well as before and after print
> statements to bracket the area of apparent data corruption in
> "list_of_lists." Thanks.
> # create a list for the list elements
> self.list_of_lists = [ ]
> node = [0,0,0,0,0,0,0]
> while x < self.listsize:
> x += 1
Pretty much what I expected. This is a bug in your code, not in
Python. What you probably want is
self.list_of_lists.append(list(node)) or the like. You're appending
*the same exact list object*. If you change one, it changes "them
all", because they are the same list.
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