Beginner question! :-)
x=[1,2,3,4]
for i in range(len(x)):
print x[:-i]
>>> []
>>> [1,2,3]
>>> [1,2]
>>> [1]
1) The x[:-0] result seems inconsistent to me;
I get the idea that -0=0, so it is taken as x[:0] -> []
2) how then should one do this basic left-recursive subsetting (easily).
Thanks.
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