Python: How to Avoid KeyError with defaultdict

Описание: #Shorts #Python

Python tips and tricks:
If you're tired of getting the KeyError in your Python application or checking if the dictionary contains a key every time, one of the alternatives is to use the defaultdict. There are a few ways to use it but one of them is to pass in a "handler" function, which will be executed if a key is not found in the dictionary and its result will be retrieved as if the key actually did exist!

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