Web Reference: Unfortunately, for me, I need to make a script backward compatible w/Python 2.4, and defaultdict doesn't exist in 2.4 version. What can be an alternative for it? Oct 4, 2025 · In Python, defaultdict is a subclass of the built-in dict class from the collections module. It automatically assigns a default value to keys that do not exist, which means you don’t have to manually check for missing keys and avoid KeyError. Jun 28, 2021 · Every Python developer knows about dictionary objects in Python. However, there is another dictionary-like object, called a defaultdict object, which offers additional functionality when compared to regular dictionary objects.
YouTube Excerpt: In this video, we are going to learn theDefaultdict() - An
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