On 11/05/18 15:04, Jacco van Dorp wrote:
A while ago, we had this gem:
2018-04-06 8:19 GMT+02:00 Serhiy Storchaka<storch...@gmail.com>:
Using currently supported syntax:
smooth_signal = [average for average in [0] for x in signal for average in
[(1-decay)*average + decay*x]]
Go ahead and understand that line in 1 go. It's currently legal syntax
for a running average for a smoothing signal, which remembers
something about it. (Subject: Proposal: A Reduce-Map Comprehension and
a "last" builtin)
You're not allowed to work it out bit by bit, just understand the
entire line or nothing. Any failure of yours proves my point.
Personally I thought it proved the point that you shouldn't be trying to
squash things like that into a list comprehension in the first place,
because
average = 0
smooth_signal = []
for x in signal:
average = (1 - decay) * average + decay * x
smooth_signal.append(average)
is quite a bit more comprehensible.
--
Rhodri James *-* Kynesim Ltd
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