Web Reference: Mar 28, 2026 · Python dictionary is a data structure that stores information in key-value pairs. While keys must be unique and immutable (like strings or numbers), values can be of any data type, whether mutable or immutable. In this tutorial, you’ll explore how to create dictionaries using literals and the dict() constructor, as well as how to use Python’s operators and built-in functions to manipulate them. Dictionary items are ordered, changeable, and do not allow duplicates. Dictionary items are presented in key:value pairs, and can be referred to by using the key name.
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