统计某一列中某一值出现的次数

def count_occurrences(column, value):
    count = 0
    for data in column:
        if data == value:
            count += 1
    return count

# 示例用法
column = [1, 2, 2, 3, 4, 2, 1]
value = 2
occurrences = count_occurrences(column, value)
print("值 {} 在列中出现的次数为：{}".format(value, occurrences))

public int countOccurrences(int[] column, int value) {
    int count = 0;
    for (int data : column) {
        if (data == value) {
            count++;
        }
    }
    return count;
}

// 示例用法
int[] column = {1, 2, 2, 3, 4, 2, 1};
int value = 2;
int occurrences = countOccurrences(column, value);
System.out.println("值 " + value + " 在列中出现的次数为：" + occurrences);