Web Reference: Feb 16, 2026 ยท update () method in Python dictionary is used to add new key-value pairs or modify existing ones using another dictionary, iterable of pairs or keyword arguments. If a key already exists, its value is replaced. If the key does not exist, it is added to the dictionary. Definition and Usage The update() method inserts the specified items to the dictionary. The specified items can be a dictionary, or an iterable object with key value pairs. Either another dictionary object or an iterable of key:value pairs (iterables of length two). If keyword arguments are specified, the dictionary is then updated with those key:value pairs.
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