Beginner’s Guide to the zip() function in Python3
- 时间:2020-09-21 09:15:21
- 分类:网络文摘
- 阅读:81 次
The zip function in Python 3 takes two parameters, and generate an iterator that contains tuples. Each tuple takes a value from each input – which can be tuples or arrays. It can be illustrated as follows:

python3-zip-function
Python3 zipping two tuples
In Python2, the zip function will return all the zipped-elements in an array while in Python3, the zip function will returns an iterator – saving memory. For example,
1 2 3 4 | a = (1, 2, 3) b = (4, 5, 6) zip(a, b) # <zip object at 0x7ff81cb770c8> list(zip(a, b)) # [(1, 4), (2, 5), (3, 6)] |
a = (1, 2, 3) b = (4, 5, 6) zip(a, b) # <zip object at 0x7ff81cb770c8> list(zip(a, b)) # [(1, 4), (2, 5), (3, 6)]
As you can see in this example, the source inputs can be tuples as well. You can mix-and-match and the result is always an iterator. Then you can easily convert the iterator to array using list() or to set using the set().
zipping takes minimal length
If both inputs are of different sizes, the zip function will only zip the minimal length of both. For example,
1 2 3 4 | a = (1, 2, 3, 4) b = (4, 5, 6) zip(a, b) # <zip object at 0x7abcdcb770c8> set(zip(a, b)) # {(1, 4), (2, 5), (3, 6)} |
a = (1, 2, 3, 4) b = (4, 5, 6) zip(a, b) # <zip object at 0x7abcdcb770c8> set(zip(a, b)) # {(1, 4), (2, 5), (3, 6)}
zip nested elements
The zip function can take nested inputs as well, for example:
1 2 3 | a=[(1,2),(3,4)] b=[(5,6),(7,8)] list(zip(a,b)) # produces [((1, 2), (5, 6)), ((3, 4), (7, 8))] |
a=[(1,2),(3,4)] b=[(5,6),(7,8)] list(zip(a,b)) # produces [((1, 2), (5, 6)), ((3, 4), (7, 8))]
You can use the zip() function to achieve something similar of what the enumerate() does in Python.
–EOF (The Ultimate Computing & Technology Blog) —
推荐阅读:老虎请客——小花猪6 揭穿阴谋——小花猪7 虎狈为奸——小花猪8 老虎认亲——小花猪9 跳远比赛——小花猪10 虎逃狈亡——小花猪11 真实的虚数 能被2、5、3、9、4、25、8、125、7、11、13等数整除的数的特征 哥德巴赫猜想的简介 我好困好困|小学作文
- 评论列表
-
- 添加评论