Python:对列表进行数字排序

本文介绍了Python:对列表进行数字排序的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一个x，y坐标列表，我需要根据x坐标进行排序，然后在x相同时再选择y坐标，并消除相同坐标的重复项.例如，如果列表为:

I have a list of x,y coordinates that I need to sort based on the x coordinate, then y coordinate when x is the same and eliminate duplicates of the same coordinates. For example, if the list is:

[[450.0, 486.6], [500.0, 400.0], [450.0, 313.3], [350.0, 313.3], [300.0, 400.0], [349.9, 486.6], [450.0, 313.3]]

我需要将其重新排列为:

I would need to rearrange it to:

[[300.0, 400.0], [349.9, 486.6], [350.0, 313.3], [450.0, 313.3], [450.0, 486.6], [500.0, 400.0]]

(已删除重复的[450.0, 313.3])

推荐答案

无论如何，这是列表列表的正常排序顺序.用字典将其删除.

That is the normal sort order for a list of lists, anyway. De-dupe it with a dict.

>>> L = [[450.0, 486.6], [500.0, 400.0], [450.0, 313.3], [350.0, 313.3], [300.0, 400.0], [349.9, 486.6], [450.0, 313.3]] >>> sorted({tuple(x): x for x in L}.values()) [[300.0, 400.0], [349.9, 486.6], [350.0, 313.3], [450.0, 313.3], [450.0, 486.6], [500.0, 400.0]]