Python程序查找列表中出现奇数次的元素
当需要查找列表中出现奇数次的元素时,可以定义一个方法。此方法遍历列表并检查嵌套循环中的元素是否匹配。如果匹配,则计数器递增。如果该计数不能被 2 整除,则将列表的特定元素作为结果返回。否则,返回 -1 作为结果。
下面是相同内容的演示 -
示例
def odd_occurence(my_list, list_size): for i in range(0, list_size): count = 0 for j in range(0, list_size): if my_list[i] == my_list[j]: count+= 1 if (count % 2 != 0): return my_list[i] return -1 my_list = [34, 56, 78, 99, 23, 34, 34, 56, 78, 99, 99, 99, 99, 34, 34, 56, 56 ] print("The list is :") print(my_list) n = len(my_list) print("The length is :") print(n) print("The method to find the element that occurs odd number of times is called ") print("The element that occurs odd number of times is :") print(odd_occurence(my_list, n))
输出
The list is : [34, 56, 78, 99, 23, 34, 34, 56, 78, 99, 99, 99, 99, 34, 34, 56, 56] The length is : 17 The method to find the element that occurs odd number of times is called The element that occurs odd number of times is : 34
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解释
定义了一个名为“odd_occurence”的方法,它将列表及其大小作为参数。
将列表大小作为范围,并遍历列表。
迭代两个嵌套循环,如果列表中的元素与第一个和第二个循环迭代匹配,“count”变量递增。
如果“count”变量是奇数,则返回列表中的特定元素。
定义一个整数列表并在控制台上显示。
将列表的长度存储在一个变量中。
通过传递相关参数来调用该方法。
在控制台上显示输出。
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