Python implements permutations and combinations

1.python language is simple, convenient, the internal can be quickly implemented permutation combination algorithm, the following is a brief introduction, 2. A list of data any combination 2.1 is mainly the use of their own library

#_*_ coding:utf-8 _*_#__author__=‘dragon‘import itertoolslist1 = [1,2,3,4,5]list2 = []for i in range(1,len(list1)+1): iter = itertools.combinations(list1,i) list2.append(list(iter))print(list2)

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3. Implementation of permutations

#_*_ coding:utf-8 _*_#__author__=‘dragon‘import itertoolslist1 = [1,2,3,4,5]list2 = []for i in range(1,len(list1)+1): iter = itertools.permutations(list1,i) list2.append(list(iter))print(list2)

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Can be combined according to your needs

Python implements permutations and combinations