本篇阅读的代码实现了随机打乱列表元素的功能,将原有列表乱序排列,并返回一个新的列表(不改变原有列表的顺序). 本篇阅读的代码片段来自于30-seconds-of-python. shuffle from copy import deepcopy from random import randint def shuffle(lst): temp_lst = deepcopy(lst) m = len(temp_lst) while (m): m -= 1 i = randint(0, m) tem…
from random import shuffle def shuffle_str(s): # 将字符串转换成列表 str_list = list(s) # 调用random模块的shuffle函数打乱列表 shuffle(str_list) # 将列表转字符串 return ''.join(str_list) # 调用 if __name__ == '__main__': for i in range(5): print(shuffle_str('hello,world!')) 输出结果:…
1. 构造二维列表: 比如我现在需要一个100*100的二维列表: a = [] for i in range(100): a.append([]) for j in range(100): a[i].append(data) # 这里插入列表元素的值 2. 排序字典: 比如我现在想要python的字典全部按键排序存放: from collections import OrderedDict d = OrderedDict() d['c'] = 1 d['k'] = 2 d['z'] = 3 d…
python列表最重要的列表的循环,任何有序列表离不开循环,列表的循环 for in range等关键词,还有列表排序,正序,倒序,还有列表每个元素的最大,最小,统计元素的个数等. 1,列表的循环 range(10) for i in range(10) for a in rang("names") 2,列表的排序 n1=[1,2,3,4,5,6,7,8,9] n1.sort(n1) 正序排列 n1.reverse(n1) 反序排列 3,列表的统计 n1=[2,3,4,6,7,8]…
Write a function: def solution(A) that, given an array A of N integers, returns the smallest positive integer (greater than 0) that does not occur in A. For example, given A = [1, 3, 6, 4, 1, 2], the function should return 5. Given A = [1, 2, 3], the…
