如何从字典中识别类别并进行打印

def print_categories(dictionary):
    categories = set()
    for key, value in dictionary.items():
        categories.add(type(value).__name__)

    for category in categories:
        print(category)

# 示例字典
my_dictionary = {
    "name": "John Doe",
    "age": 30,
    "salary": 50000.00,
    "is_employed": True,
    "skills": ["Python", "Java", "C++"],
    "address": {
        "street": "123 Main St",
        "city": "New York",
        "country": "USA"
    }
}

print_categories(my_dictionary)

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