Python:查找列表元素之间的差异 [英] Python: Finding differences between elements of a list

问题描述

给出一个数字列表，如何找到每个第( i )个元素与其第( i + 1 )个元素之间的差异?

Given a list of numbers, how does one find differences between every (i)-th elements and its (i+1)-th?

使用 lambda 表达式还是列表理解更好?

Is it better to use a lambda expression or maybe a list comprehension?

例如:

给出一个列表 t = [1,3,6，...] ，目标是找到一个列表 v = [2,3，...] 因为3-1=2、6-3=3 等

Given a list t=[1,3,6,...], the goal is to find a list v=[2,3,...] because 3-1=2, 6-3=3, etc.

推荐答案

>>> t
[1, 3, 6]
>>> [j-i for i, j in zip(t[:-1], t[1:])]  # or use itertools.izip in py2k
[2, 3]

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