使用键值和没有对应值的python中的字典初始化 [英] Initializing a dictionary in python with a key value and no corresponding values

问题描述

我想知道是否有一种方法可以在python中用键初始化字典，但没有相应的值，直到我设置它们.如:

I was wondering if there was a way to initialize a dictionary in python with keys but no corresponding values until I set them. Such as:

Definition = {'apple': , 'ball': }

然后我可以设置它们:

Definition[key] = something

我只想初始化键，但是直到以后必须设置它们时，我才知道相应的值.基本上，我知道要添加找到值的键.谢谢.

I only want to initialize keys but I don't know the corresponding values until I have to set them later. Basically I know what keys I want to add the values as they are found. Thanks.

推荐答案

您可以将它们初始化为None.

You could initialize them to None.

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