On 2016-01-16 18:02, Cameron Simpson wrote:
On 16Jan2016 18:43, boB Stepp <robertvst...@gmail.com> wrote:
This led me to try:
mylist[:None]
[100, 200, 300, 400, 500]
So, in effect, None is acting as a place holder for that final
position in slices. Also, I would never have thought to be able to
use a logical "or" inside an index in Peter's "[:-i or None]".
Yah, like the default value for many missing parameters. When you
don't need an expression after the ":" you can of course write:
mylist[:]
much like writing a function "def f(x, y=None)"; None is a sentinel
value - specially recognised as nor in the normal domain for that
value.
Can you please clarify the last bit:
"specially recognised as nor in the normal domain for that value."
thanks,
Alex
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