Python: Finding differences between elements of a list

list, python

Solution

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

Problem

Given a list of numbers, how does one find differences between every (`i`)-th elements and its (`i+1`)-th? Is it better to use a `lambda` expression or maybe a list comprehension? For example: 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.

Original source