> Interesting. I tried the *2 method twice, but I kept
> getting weird results, I guess because I was using append
> and not extend. I thought extend added lists to lists,
> but obviously that's not the case here.
In the above example, it *is* "add[ing] lists to lists".
Note the set of brackets:
series = [100]
for x in range(10): # just for testing
series.extend([series[-1] - 1]*2)
You have a one-element series:
[series[-1] - 1]
that gets duplicated using the overloading of the
multiplication ("duplication") operator:
[...] * 2
This yields a two-element list. This list then gets passed
to extend(), to add those two elements to the original list.
If you used append() instead of extend(), it would be
something like
[100, [99, 99], [98, 98],...]
-tkc
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