Python: Generate all permutations of a list in Python
Python List: Exercise - 18 with Solution
Write a Python program to generate all permutations of a list in Python.
In mathematics, the notion of permutation relates to the act of arranging all the members of a set into some sequence or order, or if the set is already ordered, rearranging (reordering) its elements, a process called permuting. These differ from combinations, which are selections of some members of a set where order is disregarded.
In the following image each of the six rows is a different permutation of three distinct balls.
import itertools print(list(itertools.permutations([1,2,3])))
[(1, 2, 3), (1, 3, 2), (2, 1, 3), (2, 3, 1), (3, 1, 2), (3, 2, 1)]
In the above exercise -
import itertools -> Import the itertools module.
list(itertools.permutations([1,2,3])): Generate all permutations of the list [1,2,3] using the permutations() function from the itertools module. The permutations() function returns an iterator, so we need to convert it to a list to print it.
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Python: Tips of the Day
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def tips_capitalize(s, lower_rest=False): return s[:1].upper() + (s[1:].lower() if lower_rest else s[1:]) print(tips_capitalize('pythonTips')) print(tips_capitalize('pythonTips', True))
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