Скачать или смотреть Python Dictionaries

Python dictionary is an unordered collection of data values used to store data in key-value pairs [1, 2]. It is a built-in data type that is highly flexible and widely used.
Here are some key characteristics of Python dictionaries:
Key Features
Key-Value Pairs: Each element in a dictionary has a unique key associated with a specific value.
Mutable: Dictionaries can be changed after they are created (you can add, remove, or modify items) [1].
Unordered: The items in a dictionary do not have a defined order (as of Python 3.7+, dictionaries are insertion-ordered, but they are still not indexed by position) [1].
Keys Must Be Immutable: Keys must be of an immutable type, such as strings, numbers, or tuples. Values can be of any type and can be duplicates [2].
Dynamic: Dictionaries can grow or shrink as needed.