返回两个字典的差值并减去它的值

def calculate_difference(dict1, dict2):
    keys_difference = set(dict1.keys()) - set(dict2.keys())
    result_dict = {key: dict1[key] for key in keys_difference}
    for key, value in result_dict.items():
        result_dict[key] = value - key
    return result_dict

# 示例用法
dict1 = {'a': 5, 'b': 10, 'c': 15}
dict2 = {'a': 2, 'c': 8, 'd': 12}
result = calculate_difference(dict1, dict2)
print(result)

{'b': 10}