python 给字典dict对象做排序
test_dict = {
"a": 21,
"c": 3,
"g": 56,
"b": 34,
"j": 12,
}
sorted_items = sorted(test_dict.items(), key=lambda item: item[1], reverse=True) # reverse: true 递减排序，false 递增排序
print(sorted_items) # [('g', 56), ('b', 34), ('a', 21), ('j', 12), ('c', 3)]