04 Sets

1. Overview

Set: is an unordered collection of unique objects.
A set can be created from a tuple or list

Shell

>>> a = [3, 4, 5]
>>> s = set(a)
>>> print(s)
{3, 4, 5}
>>> type(s)
<class 'set'>

2. Some notes

2.1 Duplicates

Important

Duplicates are ignored

Shell

>>> a = [3, 4, 5]
>>> s = set(a)
>>> print(s)
{3, 4, 5}
>>> type(s)
<class 'set'>
>>> 
>>> a = [3, 3, 5]
>>> s = set(a)
>>> print(s)
{3, 5}
>>>

2.2 The `|` operator and the `&` operator

Shell

>>> a = set([3, 4, 5])
>>> b = set([4, 5, 6])
>>> print(a)
{3, 4, 5}
>>> print(b)
{4, 5, 6}
>>> print(a | b)
{3, 4, 5, 6}
>>> print(a & b)
{4, 5}
>>>

2.3 The `-` operator and the `^` operator

Shell

>>> print(a)
{3, 4, 5}
>>> print(b)
{4, 5, 6}
>>> print(b - a)
{6}
>>> print(b ^ a)
{3, 6}
>>>