What is zip function in python?

What is zip function in python?

The zip() function in python is used to take an iterable object as a parameter, pack the corresponding elements in the object into tuples, and then return an object composed of these tuples. The advantage of this is that it saves a lot of memory.

If the number of elements of each iterator is inconsistent, the length of the returned list is the same as the shortest object

Related recommendations: "Python Tutorial"

Syntax

zip([iterable, ...])

Parameters: iterable is one or more iterators

Return value: An object is returned, and list() conversion can be used to output a list

1. Example 1

>>> a = [1, 2, 3]
>>> b = [4, 5, 6]
>>> zip(a, b)
<zip object at 0x0000000003BB4188>
>>> list(zip(a, b))
[(1, 4), (2, 5), (3, 6)]
>>> 
>>> 
>>> c = [4, 5, 6, 7, 8]
>>> list(zip(a, c))
[(1, 4), (2, 5), (3, 6)]
>>>

2. Example 2

Two lists of equal length are merged into a dictionary: keys = ["A", "B", "C"], values ​​= ["1", "2", "3"], requirement: merge into {"A":1, "B":2, "C" :3}, please use one line of code to implement the

idea: first use the zip() function to pack the two lists into a tuple object, and then use dict to construct the dictionary, so the code is

print(dict(zip(keys, values)))

Run result:

{'B': '2', 'A': '1', 'C': '3'}

The above is the detailed content of What is zip function in python?. For more information, please follow other related articles on the PHP Chinese website!