Join multiple sets in Python

This post will discuss how to join multiple sets in Python.

1. Using `itertools.chain()` function

The itertools module provides several useful functions to create iterators for efficient looping. You can use its chain() function to join two or more sets together, as shown below:

import itertools

if __name__ == '__main__':

x = {1, 3}

y = {5}

z = {7, 9}

s = set(itertools.chain(x, y, z))

print(s) # {1, 3, 5, 7, 9}

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2. Using Iterable Unpacking Operator

With Python 3.5, you can use the * iterable unpacking operator for joining multiple sets. Here’s what the code would look like:

if __name__ == '__main__':

x = {1, 3}

y = {5}

z = {7, 9}

s = {*x, *y, *z}

print(s) # {1, 3, 5, 7, 9}

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3. Using `union()` function

The union() function appends all the items from a set to another set. You can use it for joining multiple sets, as shown below:

if __name__ == '__main__':

x = {1, 3}

y = {5}

z = {7, 9}

s = set().union(x).union(y).union(z)

print(s) # {1, 3, 5, 7, 9}

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That’s all about joining multiple sets in Python.

Join multiple sets in Python

1. Using itertools.chain() function

2. Using Iterable Unpacking Operator

3. Using union() function

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1. Using `itertools.chain()` function

3. Using `union()` function