如何在python字典中的键具有多个值? [英] How to have multiple values for a key in a python dictionary?

问题描述

我遇到的情况是，同一键可能具有与之关联的不同字符串.

I have a case where the same key could have different strings associated with it.

例如flow和wolf都具有相同的字符，如果我将它们排序并用作字典中的键，我想将原始字符串作为值.

e.g. flow and wolf both have the same characters, if I sort them and use them as keys in a dictionary, I want to put the original strings as values.

我在python字典中尝试过:

I tried in a python dict as:

d = {}

d["flow"] = flow
d["flow"] = wolf

但是只有一个与键相关联的值.

but there is only one value associated with the key.

我尝试了d["flow"].append("wolf")，但这也行不通.

I tried d["flow"].append("wolf") but that also doesn't work.

如何使这种情况与Python字典配合使用?

How to get this scenario working with Python dicts?

推荐答案

您不能在具有相同键的字典中包含多个项.您应该做的是将值设置为list.像这样-

You can't have multiple items in a dictionary with the same key. What you should do is make the value a list. Like this -

d = dict()
d["flow"] = ["flow"]
d["flow"].append("wolf")

如果这是您要执行的操作，则可能要使用

If that is what you want to do, then you might want to use defaultdict. Then you can do

from collections import defaultdict
d = defaultdict(list)
d["flow"].append("flow")
d["flow"].append("wolf")

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