散列上的嵌套迭代

class HashTable:
    def __init__(self):
        self.size = 10
        self.table = [[] for _ in range(self.size)]

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

    def insert(self, key, value):
        index = self.hash_function(key)
        for pair in self.table[index]:
            if pair[0] == key:
                pair[1] = value
                return
        self.table[index].append([key, value])

    def get(self, key):
        index = self.hash_function(key)
        for pair in self.table[index]:
            if pair[0] == key:
                return pair[1]
        raise KeyError(key)

nested_dict = {
    'a': {'1': 'one', '2': 'two'},
    'b': {'3': 'three', '4': 'four'}
}

for key1, inner_dict in nested_dict.items():
    for key2, value in inner_dict.items():
        print(f"{key1}-{key2}: {value}")