Ordered Vs Unordered Data Structures In Python - Programmer Bose

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Ordered Vs Unordered Data Structures in PythonPython has multiple data structures like Lists, Tuples, Dictionaries, Sets, and more. Some of them are Ordered and some are Unordered. This article will discuss Ordered Vs Unordered Data Structures in Python.

Lists

It is a collection of a mutable ordered sequence of elements and can be accessed through indexing and defined inside []. Each element inside a List is called an item.Lists in pythonFrom the above example, it is clear that the list maintains a sequence in which elements are inserted. So, it is an ordered data structure in python.

Tuples

It is a collection of immutable ordered elements, which follows a sequence in which elements are inserted. It is defined inside () and accessed through indexing.Tuples in pythonThe above example shows that Tuples are ordered data structure and follow the sequence of insertion.

Dictionaries

Collection of items, in which items are defined as key-value pair in {}. Dictionaries are ordered data structures in python. It can be accessed through a specific key.Each key is separated from its value by a colon (:), the items are separated by commas. Keys in a dictionary must be immutable data types. However, values can be of any type.Dictionaries in pythonFrom the above example, it is clear that the dictionary in python is ordered data structures.

*As of Python version 3.7, dictionaries are ordered. In Python 3.6 and earlier, dictionaries are unordered.

Sets

Set is a python collection that is immutable, unordered, and unindexed. No duplicate members. It is defined inside {}.Sets in Python

As you can see from the above example that sets in python are unordered data structures.

When choosing a collection type in python, it is useful to understand the properties of that type.

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