Python Sets

Sets are collections of unique elements. We don't care about positions here. That's why we will have different result every time sets are printed.

To create set, use curly bracket:

colors = {"Green", "Yellow", "Red", "Black"}

print(colors)
print(type(colors))

Result: 

{'Black', 'Yellow', 'Green', 'Red'}
<class 'set'>
>>> 

Or dedicated set() function. Don't forget to use double parentheses:

colors_2 = set(("White", "Blue"))

print(colors_2)
print(type(colors_2))

Result: 

{'Blue', 'White'}
<class 'set'>
>>> 

Try to print set multiple times - positions will be different every time:

colors = {"Green", "Yellow", "Red", "Black", "Black"}

print(colors)

Results: 

============== RESTART: C:\Python38-64\ARCHIVE\learning-python.py ==============
{'Red', 'Black', 'Yellow', 'Green'}
>>> 
============== RESTART: C:\Python38-64\ARCHIVE\learning-python.py ==============
{'Green', 'Yellow', 'Red', 'Black'}
>>> 
============== RESTART: C:\Python38-64\ARCHIVE\learning-python.py ==============
{'Black', 'Yellow', 'Red', 'Green'}
>>> 

In next tutorial, we will learn how to Add or Update Sets with new elements.