python - 在 For 循环中迭代两个范围

Question

我有几个像这样的简单循环:

for i in range (30, 52):

    #do some stuff here

for i in range (1, 18):

    #do some more stuff

我想要的是使用命令的语法将其压缩成一个循环:

for i in range((30, 52), (1, 18):

    #do some stuff

我意识到语法不起作用，但这是我需要的基本概念。我见过有人使用 zip 同时迭代两个范围，但这不是我需要的。

有什么想法吗？

Answer 1

来自 https://docs.python.org/2/library/itertools.html#itertools.chain :

Make an iterator that returns elements from the first iterable untilit is exhausted, then proceeds to the next iterable, until all of theiterables are exhausted. Used for treating consecutive sequences as asingle sequence.

例子:

import itertools as it
for i in it.chain(range(30, 52), range(1, 18)):
    print(i)

对于 python 3

你可以一起循环进入两个范围

例子:

import itertools as it
for i, x in it.zip_longest(range(30, 52), range(1, 18)):
    print(i, x)