利用functools.total_ordering 装饰器简化实现 为了简化富比较方法的编写 ,Python标准库提供了functools.total_ordering装饰器,它可以根据已定义的一些比较方法自动推导出其他方法。 from functools import total_ordering @total_ordering class PersonRichCompare: def __init__(self, name, age): self.name = name s...
AI代码解释 print(set(dir(p1))-set(dir(p2)))#为什么要转为集合,因为list列表,是不能进行差集运算的,也就是-操作 执行结果: {'_weakref_', '_dict_'} 我们可以看出,当我们设置slots后,这个类里的 上面的2个属性就没了,一个是_weakref_弱引用,一个是类中的动态绑定属性 查看类占用的内存空间大小 sys...
# distorted orderingprint ("The list after removing duplicates : " + str(test_list)) → 输出结果: The original list is : [1, 5, 3, 6, 3, 5, 6, 1]The list after removing duplicates : [1, 3, 5, 6] 方法4:利用列表解析式 + ...
Python list implements the sort() method for ordering (in both ascending and descending order) its elements in place. list1.sort() Sorting in ascending order: Python 1 2 3 4 5 list1 = [1,3,2,4,5,9,6] list1.sort() print(list1) Output: [1, 2, 3, 4, 5, 6, 9] Sorting...
也可以使用列表本身的方法list.sort()去排序。它会改变list的内容,然后返回None作为执行的结果,以避免混淆。一般来说它没有sorted()那么方便,但是如果你不需要原来的列表的话,使用它在性能上会有轻微的提升。 >>> a = [5, 2, 3, 1, 4]>>>a.sort()>>>a ...
To demonstrate a basic example, let’s assume the requirement for ordering a specific list is the length of the strings in the list, from shortest to longest. You can use the len() function to return the length of a string, along with the key argument: ...
key(optional): This parameter is a function that can be used to customize the comparison and determine the maximum based on the result of applying this function to each element. If not provided, the maximum is determined based on the natural ordering of the elements. ...
Luckily, sort has a special parameter called key which we can use to specify the ordering:my_list = ["leaf", "cherry", "Fish"] my_list.sort(key=str.casefold) print(my_list) # prints ["cherry", "Fish", "leaf"]In the next section, we’ll discuss this key parameter more deeply...
sorted_strings = sorted(strings_list, key=locale.strxfrm) The sorted_strings list will now be sorted according to the English (US) locale, with case-insensitive and accent-aware ordering. Keep in mind that it’s essential to set the correct locale before sorting, as different locales may hav...
== b: return 0 return 1 if (a, b) in comes_after else -1sorted_colors = sorted(colors, key=ordering_rules) 我将您的规则放入一个集合中,因为针对一个集合的成员资格测试要高效得多;(a, b)是一个元组,如果存在于comes_before集中,那么a应该在b之前排序,因此a < b为真,a == b或a > b为...