31 lines
780 B
Markdown
31 lines
780 B
Markdown
---
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title: shuffle
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tags: list,random,advanced
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firstSeen: 2018-01-19T11:59:33+02:00
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lastUpdated: 2020-11-02T19:28:35+02:00
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---
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Randomizes the order of the values of an list, returning a new list.
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- Uses the [Fisher-Yates algorithm](https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle) to reorder the elements of the list.
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- [`random.shuffle`](https://docs.python.org/3/library/random.html#random.shuffle) provides similar functionality to this snippet.
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```py
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from copy import deepcopy
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from random import randint
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def shuffle(lst):
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temp_lst = deepcopy(lst)
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m = len(temp_lst)
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while (m):
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m -= 1
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i = randint(0, m)
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temp_lst[m], temp_lst[i] = temp_lst[i], temp_lst[m]
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return temp_lst
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```
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```py
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foo = [1, 2, 3]
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shuffle(foo) # [2, 3, 1], foo = [1, 2, 3]
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```
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