如何计算哈希数组中值的数组中的项

class ListNode:
    def __init__(self, value=0, next=None):
        self.value = value
        self.next = next

class HashArray:
    def __init__(self, size):
        self.size = size
        self.table = [None] * size

    def hash_function(self, key):
        return hash(key) % self.size

    def insert(self, key):
        index = self.hash_function(key)
        if not self.table[index]:
            self.table[index] = ListNode(key)
        else:
            current = self.table[index]
            while current.next:
                current = current.next
            current.next = ListNode(key)

    def count_occurrences(self, value):
        count = 0
        for i in range(self.size):
            current = self.table[i]
            while current:
                if current.value == value:
                    count += 1
                current = current.next
        return count

# 示例使用
hash_array = HashArray(10)
hash_array.insert(5)
hash_array.insert(15)
hash_array.insert(25)
hash_array.insert(5)

print("Value 5 occurs", hash_array.count_occurrences(5), "times")