Slicing [N::-1]

Steven D'Aprano steve at REMOVE-THIS-cybersource.com.au
Fri Mar 5 19:22:59 CET 2010


On Fri, 05 Mar 2010 10:01:40 -0800, Joan Miller wrote:

> What does a slice as [N::-1] ?

Why don't you try it?

>>> s = "abcdefgh"
>>> s[4::-1]
'edcba'

The rules for extended slicing are not explained very well in the docs, 
and can be confusing. In my experience, apart from [::-1] it is best to 
always use a positive stride (the third number).


-- 
Steven



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