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# Python Set | union method

schedule Aug 12, 2023
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Python's `set.union(~)` method returns a new set with elements from all the provided sets.

# Parameters

1. `sets` | `set` | `optional`

The sets from which we will include elements from.

# Return value

A new set with elements from all the provided sets.

# Examples

## Basic usage

To return a new set with all elements from sets `a`, `b`, `c`:

``` a = {'dog', 'cat'}b = {'sheep', 'dog'}c ={'mouse', 'dog'}a.union(b, c) {'cat', 'dog', 'mouse', 'sheep'} ```

We can see that we return a new set containing all distinct elements from sets `a`, `b`, `c`. By definition, Sets do not allow duplicates values, hence `'dog'` only appears once in the returned set.

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