![]() Keys can be of any immutable type (e.g., strings, numbers, tuples). Building Blocks of a DictionaryĪ key in a dictionary serves as a unique identifier that allows us to locate specific information. Unlike ordered or indexed sequences (such as lists), dictionaries are mappings that assign a distinct name or key to each element. In terms of Python's data structures, dictionaries are containers that can hold other objects. The dictionary's key is similar to a word that we would like to search for, and the value is like the corresponding definition of the word in the dictionary. You can visualize a Python dictionary by thinking about traditional physical dictionaries. A Brief Anatomy of a Dictionary What Is a Dictionary in Python? We will review illustrative examples and discuss the appropriate contexts for each approach. In this article, we will take a look at different approaches for accessing keys and values in dictionaries. It is an unordered collection of key-value pairs, where the values are stored under a specific key rather than in a particular order. These two elements form what is called a key-value pair (a key with its corresponding value).A dictionary in Python is an essential and robust built-in data structure that allows efficient retrieval of data by establishing a relationship between keys and values. Values: these are the values that you can access with their corresponding key.In dictionaries, to access a value, you use the key, which is a value itself. ![]() Keys are the equivalent of "indices" in strings, lists, and tuples.
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