Python Sets
Python Tutorial » Python Sets
A set is an unordered collection of elements. Every set element is unique (without duplicates) and it cannot be changed, but, a set itself can be change (is mutable). We can add or remove elements from it.
Sets can be used to perform mathematical set operations like intersection, union, symmetric difference, etc.
A set are written by placing all the elements inside curly braces "{}" without quotes, separated by comma, or by using the built-in set() function.
Example: How to create Python Sets:
Output:
{'Tom', 'John', 'Nick', 'Chris'}
my_set = {"John", "Chris", "Tom", "Nick"}
print(my_set)
# Note: usually, set list is unordered (items will appear in a random order)
print(my_set)
# Note: usually, set list is unordered (items will appear in a random order)
Output:
{'Tom', 'John', 'Nick', 'Chris'}
Python Sets NOT Allow Duplicates - examples
Example: Duplicate item will be ignored
{'Tom', 'Chris', 'Ann', 'John'}
my_set = {"John", "Ann", "Chris", "Tom", "John", "Tom"}
print(my_set)
Output: print(my_set)
{'Tom', 'Chris', 'Ann', 'John'}
How to Get the Length of a Set
Example: how many elements this set has, useing len() method
4
my_set = {"John", "Ann", "Chris", "Tom"}
print(len(my_set))
Output:print(len(my_set))
4
Set Items - Data Types
Elements can be of any data type.
Example: elements can be any data type:
{'John', 'Ann', 'Chris', 'Tom'}
{9, 22, 31, 12, 87, 3}
{True, False, False}
my_set1 = {"John", "Ann", "Chris", "Tom"}
my_set2 = {9, 22, 31, 12, 87, 3}
my_set3 = {True, False, False}
print(my_set1)
print(my_set2)
print(my_set3)
Output:my_set2 = {9, 22, 31, 12, 87, 3}
my_set3 = {True, False, False}
print(my_set1)
print(my_set2)
print(my_set3)
{'John', 'Ann', 'Chris', 'Tom'}
{9, 22, 31, 12, 87, 3}
{True, False, False}
Python Sets methods, difference, vs lists, pop, operation, update, documentation, index, intersection, are mutable or immutable
Python Sets - python
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