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What are dictionaries used for in Python?

The Python dictionaries are used to retrieve the values when the key is known. A dictionary in Python can be created by placing the items inside the curly braces and are separated by a comma. An item in the dictionary is a pair that consists of a key and a value written as: key: value.

What is a dictionary key in Python?

A dictionary maps a set of objects (keys) to another set of objects (values). A Python dictionary is a mapping of unique keys to values. Dictionaries are mutable, which means they can be changed. The values that the keys point to can be any Python value.

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