[英]Python: sort list of nested lists according to two criteria
在Python中,我有一個嵌套列表,如下所示:
[ [[x1,y1,z1], [['0.9', 4], [0.8, 3], [0.5, 10], [0.1, 11]],
[[x2,y2,z2], [['1.0', 8], [0.8, 3], [0.2, 1], [0.1, 8]]
...]
所以每個元素的形式如下:
[[3-tuple], [[val1, occurrences_of_val1], [val2, occurrences_of_val2],...]]
第二個嵌套列表已按第一個項目排序(val1> val2> val3 ...),但我還希望3元組[x,y,z]按照兩個條件按降序排列:
我該怎么做呢? 可能與itemgetter,但我不確定在這種情況下。
yourList.sort(key=lambda x: x[1], reverse=True)
我測試了這個
X=[ [[4,5,6], [[3.0, 4], [0.8, 3], [0.5, 10], [0.1, 11]]],
[[2,1,3], [[2.0, 8], [0.8, 3], [0.2, 1], [0.1, 8]]]]
>>> X.sort(key=lambda x: x[1])
>>> X
[[[2, 1, 3], [[2.0, 8], [0.80000000000000004, 3], [0.20000000000000001, 1], [0.10000000000000001, 8]]], [[4, 5, 6], [[3.0, 4], [0.80000000000000004, 3], [0.5, 10], [0.10000000000000001, 11]]]]
最重要的是, X.sort(key=lambda x: x[1])
按X的第二個元素排序,即通過此元素[[val1, occurrences_of_val1], [val2, occurrences_of_val2],...]
排序。 隱含地,它按val1
排序,然后在occurrences_of_val1
等於的情況下由occurrences_of_val1
...
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