当有相同的数字时，按降序和升序对字典排序

# 按降序对字典排序
def sort_descending(dictionary):
    sorted_dict = sorted(dictionary.items(), key=lambda x: x[1], reverse=True)
    return sorted_dict

# 按升序对字典排序
def sort_ascending(dictionary):
    sorted_dict = sorted(dictionary.items(), key=lambda x: x[1])
    return sorted_dict

# 示例字典
dictionary = {'a': 3, 'b': 1, 'c': 2, 'd': 3}

# 按降序排序
descending_sorted_dict = sort_descending(dictionary)
print("按降序排序结果：", descending_sorted_dict)

# 按升序排序
ascending_sorted_dict = sort_ascending(dictionary)
print("按升序排序结果：", ascending_sorted_dict)

按降序排序结果： [('a', 3), ('d', 3), ('c', 2), ('b', 1)]
按升序排序结果： [('b', 1), ('c', 2), ('a', 3), ('d', 3)]