You can achieve the same result by writing:
[None] * 8
Comparing both cases in IPython I get:
In [1]: %timeit list((None,)*8)
110 ns ± 0.785 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops each)
In [2]: %timeit [None] * 8
88.2 ns ± 0.432 ns per loop (mean ± std. dev. of 7 runs, 10000000 loops
each)
So the list multiplication appears a bit faster.
Best
Matthieu
Le 8/12/2021 à 10:57 AM, Stephen Tucker a écrit :
Hi,
I thought I'd share the following piece of code that I have recently written
(a) to check that what I have done is reasonable - even optimum,
(b) to inform others who might be wanting to do similar things, and
(c) to invite comment from the community.
-------------------------------------------
#
# Yes: Create an empty list of Band Limits for this language
#
# Note. The rather complicated logic on the right-hand side of the
# assignment below is used here because none of the following
# alternatives had the desired effect:
#
# Logic Effect
#
# [None * 8] TypeError: unsupported operand type(s) for *: ...
# [(None) * 8] TypeError: unsupported operand type(s) for *: ...
# [((None)) * 8] TypeError: unsupported operand type(s) for *: ...
# [(None,) * 8] [(None, None, None, None, None, None, None, None)]
# list ((None) * 8) TypeError: unsupported operand type(s) for *: ...
#
diclll_BLim [thisISO_] = list ((None,) * 8)
-------------------------------------------
Thanks in anticipation.
Stephen Tucker.
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