大家好，又见面了，我是你们的朋友全栈君。
_list = [{‘value’: 123, ‘upclock’: 1234567},
{‘value’: 423, ‘upclock’: 2123},
{‘value’: 123, ‘upclock’: 1234567},
{‘value’: 423, ‘upclock’: 1123},
{‘value’: 423, ‘upclock’: 1123},
{‘value’: 872, ‘upclock’: 1234567},
{‘value’: 423, ‘upclock’: 80}]
print sorted(_list, key=lambda x: (x[‘value’], x[‘upclock’]), reverse=True)
结果
[{‘upclock’: 1234567, ‘value’: 123},
{‘upclock’: 1234567, ‘value’: 123},
{‘upclock’: 80, ‘value’: 423},
{‘upclock’: 1123, ‘value’: 423},
{‘upclock’: 1123, ‘value’: 423},
{‘upclock’: 2123, ‘value’: 423},
{‘upclock’: 1234567, ‘value’: 872}]
上面是一个很简单的例子，先按照value来排序，再按照upclock排序。 有个字段reverse控制是否升降序的，但是这个控制的是整体的。我想要这样的效果，就是默认是升序，但是第二个排序字段upclock又是降序的
结果应该是这样
[{‘upclock’: 1234567, ‘value’: 123},
{‘upclock’: 1234567, ‘value’: 123},
{‘upclock’: 2123, ‘value’: 423},
{‘upclock’: 1123, ‘value’: 423},
{‘upclock’: 1123, ‘value’: 423},
{‘upclock’: 80, ‘value’: 423},
{‘upclock’: 1234567, ‘value’: 872}]
应该怎么写呢？能直接用标准库来实现吗，或者简单一点的逻辑
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