(递归)如何从具有嵌套对象和数组的对象中获取所有键/值对

def get_all_key_value_pairs(obj):
    pairs = []

    if isinstance(obj, dict):
        for key, value in obj.items():
            if isinstance(value, (dict, list)):
                nested_pairs = get_all_key_value_pairs(value)
                for nested_key, nested_value in nested_pairs:
                    pairs.append((key + '.' + nested_key, nested_value))
            else:
                pairs.append((key, value))
    elif isinstance(obj, list):
        for index, value in enumerate(obj):
            if isinstance(value, (dict, list)):
                nested_pairs = get_all_key_value_pairs(value)
                for nested_key, nested_value in nested_pairs:
                    pairs.append((str(index) + '.' + nested_key, nested_value))
            else:
                pairs.append((str(index), value))

    return pairs

obj = {
    'key1': 'value1',
    'key2': {
        'nested_key1': 'nested_value1',
        'nested_key2': 'nested_value2'
    },
    'key3': [
        {'array_key1': 'array_value1'},
        {'array_key2': 'array_value2'}
    ]
}

pairs = get_all_key_value_pairs(obj)
for key, value in pairs:
    print(key, value)

key1 value1
key2.nested_key1 nested_value1
key2.nested_key2 nested_value2
key3.0.array_key1 array_value1
key3.1.array_key2 array_value2