我的 Ordered Dict 没有按预期工作

Question

基本上我有这个代码：

from collections import OrderedDict as OD
person = OD({})

for num in range(10):
    person[num] = float(input())

tall = max(person.values())
short = min(person.values())

key_tall = max(person.keys())
key_short = min(person.keys())

print(f'The shortest person is the person number {key_short} who is {short}meters tall')
print(f'The tallest person is the person number {key_tall} who is {tall}meters tall')

理论上，当我在字典中输入 10 个人时，第一个数字为 1，一直到 9，最后一个为 0，输出应该是：

The shortest person is the person number 9 who is 0.0m meters tall
The tallest person is the person number 8 who is 9.0m meters tall

但实际上它打印：

The shortest person is the person number 0 who is 0.0m meters tall
The tallest person is the person number 9 who is 9.0m meters tall

出于某种原因，当我的字典的值从 1 一直到 10 时，它工作正常。

关于为什么会发生这种情况以及如何解决它有什么想法吗？

Answer 1

key_tall = max(person.keys())
key_short = min(person.keys())

你的 keys 是整数 0..9 所以对于这两个值你会得到 9 和 0，因为您要求 min/max 键而不考虑值。

您似乎在具有 highest/lowest 值的人的密钥之后，但这不是该代码会给您的。

如果您在寻找具有最大值的项目的索引，您可以执行以下操作：

indexes_tall = [idx for idx in range(len(person)) if person[idx] == max(person.keys())]

这将为您提供匹配最高值的索引列表，然后您可以根据需要进行处理。举个例子：

from collections import OrderedDict as OD
person = OD({})

for num in range(10):
    person[num] = float((num + 1) % 10) # effectively your input

tall = max(person.values())
short = min(person.values())

keys_tall = [str(idx + 1) for idx in range(len(person)) if person[idx] == max(person.keys())]
keys_short = [str(idx + 1) for idx in range(len(person)) if person[idx] == min(person.keys())]

print(f'The shortest height of {short}m is held by: {" ".join(keys_short)}')
print(f'The tallest height of {tall}m is held by: {" ".join(keys_tall)}')

会给你：

The shortest height of 0.0m is held by: 10
The tallest height of 9.0m is held by: 9

我的 Ordered Dict 没有按预期工作

My Ordered Dict is not working as I expected

python

collections

dictionary

ordereddict