Message 146290 - Python tracker

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In-reply-to
Author	ncoghlan
Recipients	carlo.verre, ncoghlan, petri.lehtinen, rhettinger
Date	2011年10月24日.10:45:04
SpamBayes Score	2.157544e-05
Marked as misclassified	No
Message-id	<1319453105.57.0.717854970654.issue13252@psf.upfronthosting.co.za>

Content
OK, looking at the code I realised what you're trying to get at is the idea of reporting the differences between values in a series, such that: x = list(accumulate(seq)) assert x == list(accumulate(differences(x))) I don't think the use cases are there to justify the addition (not every iterator we can think of should be a building block in itertools), but if such a thing were to be added, "differences" would convey the intention significantly better than the invented term "decumulate".

Content

OK, looking at the code I realised what you're trying to get at is the idea of reporting the differences between values in a series, such that:
x = list(accumulate(seq))
assert x == list(accumulate(differences(x)))
I don't think the use cases are there to justify the addition (not every iterator we can think of should be a building block in itertools), but if such a thing were to be added, "differences" would convey the intention significantly better than the invented term "decumulate".

History
Date	User	Action	Args
2011年10月24日 10:45:05	ncoghlan	set	recipients: + ncoghlan, rhettinger, petri.lehtinen, carlo.verre
2011年10月24日 10:45:05	ncoghlan	set	messageid: <1319453105.57.0.717854970654.issue13252@psf.upfronthosting.co.za>
2011年10月24日 10:45:04	ncoghlan	link	issue13252 messages
2011年10月24日 10:45:04	ncoghlan	create

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