python中zip的反函数是什么? [英] What is the inverse function of zip in python?

问题描述

可能重复:
Python中的Transpose/Unzip函数

Possible Duplicate:
A Transpose/Unzip Function in Python

我已经使用了numpy库中的zip()函数对元组进行排序，现在我有了一个包含所有元组的列表.从那以后，我修改了该列表，现在我想还原元组，以便可以使用我的数据.我该怎么办?

I've used the zip() function from the numpy library to sort tuples and now I have a list containing all the tuples. I had since modified that list and now I would like to restore the tuples so I can use my data. How can I do this?

推荐答案

lst1, lst2 = zip(*zipped_list)

应该给您解压缩的列表.

should give you the unzipped list.

*zipped_list解压缩zipped_list对象.然后，它将所有元组从zipped_list对象传递到zip，zip将它们打包回去时再打包.

*zipped_list unpacks the zipped_list object. it then passes all the tuples from the zipped_list object to zip, which just packs them back up as they were when you passed them in.

所以，如果:

a = [1,2,3]
b = [4,5,6]

然后zipped_list = zip(a,b)给您:

[(1,4), (2,5), (3,6)]

和*zipped_list可以给您

(1,4), (2,5), (3,6)

使用zip(*zipped_list)压缩后，会返回两个集合:

zipping that with zip(*zipped_list) gives you back the two collections:

[(1, 2, 3), (4, 5, 6)]

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