如何按python降序排序整数列表

I have tried to figure this out in different ways, to no success. I keep getting ascending order sort, rather than descending order when I print.

我试图以不同的方式解决这个问题，但没有成功。我不断按升序排序，而不是在打印时按降序排序。

ListB = [24, 13, -15, -36, 8, 22, 48, 25, 46, -9]
sorted(ListB, key=int, reverse=True)
print sorted(ListB)

5 个解决方案

#1

You are printing the list sorted ascending:

您正在打印以升序排序的列表：

print sorted(ListB)

If you want it descending, put your print statement on the previous line (where you reverse it)

如果您希望它降序，请将您的print语句放在上一行（您将其反转）

print sorted(ListB, key=int, reverse=True)

Then remove your final print statement.

然后删除最终的打印声明。

Example:

例：

>>> ListB = [24, 13, -15, -36, 8, 22, 48, 25, 46, -9]
>>> print sorted(ListB, key=int, reverse=True)
[48, 46, 25, 24, 22, 13, 8, -9, -15, -36]

#2

Try this, it'll sort the list in-place in descending order (there's no need to specify a key in this case):

试试这个，它会按降序排列列表（在这种情况下不需要指定键）：

listB = [24, 13, -15, -36, 8, 22, 48, 25, 46, -9]
listB.sort(reverse=True) # listB gets modified

print listB
=> [48, 46, 25, 24, 22, 13, 8, -9, -15, -36]

Alternatively, you can create a new sorted list:

或者，您可以创建新的排序列表：

listB = [24, 13, -15, -36, 8, 22, 48, 25, 46, -9]
listC = sorted(listB, reverse=True) # listB remains untouched

print listC
=> [48, 46, 25, 24, 22, 13, 8, -9, -15, -36]

#3

ListB = [24, 13, -15, -36, 8, 22, 48, 25, 46, -9]

ListB = sorted(ListB, key=int, reverse=True)

print ListB

Sorted does not change the variable passed to it. So if you want to do anything with them you have to store sorted output into a variable.

Sorted不会更改传递给它的变量。因此，如果您想对它们执行任何操作，则必须将已排序的输出存储到变量中。

#4

reversed(sorted(listb))

This creates an iterable going from 48 -> -36

这创建了一个从48 - > -36开始的迭代

#5

u should have combined these two lines of code together, using this instead.

你应该将这两行代码组合在一起，而不是使用它。

print sorted(ListB, key=int, reverse=True)

result:

结果：

[48, 46, 25, 24, 22, 13, 8, -9, -15, -36]

#1