Iterate

在python中，进行iterate（遍历）是非常遍历的，本文对python中与遍历有关的内容进行总结。

Python语言提供的service

• Iterator

• Iterator Types

• itertools — Functions creating iterators for efficient looping¶

Application

Iterating over every two elements in a list

Iterate a list as pair (current, next) in Python

answer中给出了如下代码：

Here's a relevant example from the itertools module docs:

import itertools
def pairwise(iterable):
    "s -> (s0,s1), (s1,s2), (s2, s3), ..."
    a, b = itertools.tee(iterable)
    next(b, None)
    return zip(a, b)   

For Python 2, you need itertools.izip instead of zip:

import itertools
def pairwise(iterable):
    "s -> (s0,s1), (s1,s2), (s2, s3), ..."
    a, b = itertools.tee(iterable)
    next(b, None)
    return itertools.izip(a, b)