Web Reference: The setdefault() method returns the value of the item with the specified key. If the key does not exist, insert the key, with the specified value, see example below Sep 8, 2025 · The setdefault () method in Python is used with dictionaries to: Return the value of a specified key if it exists. If the key does not exist, it adds the key with a default value and returns that default. It’s a handy method for setting default values while avoiding overwriting existing ones. Sep 15, 2011 · The get method allows you to do less than you can with setdefault. You can use it to avoid getting a KeyError when the key doesn't exist (if that's something that's going to happen frequently) even if you don't want to set the key.
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