x = set()
# We add to sets with the add() method
x.add(1)
#Show
x
Note the curly brackets. This does not indicate a dictionary! Although you can draw analogies as a set being a dictionary with only keys.
We know that a set has only unique entries. So what happens when we try to add something that is already in a set?
# Add a different element
x.add(2)
#Show
x
# Try to add the same element
x.add(1)
#Show
x
Notice how it won't place another 1 there. That's because a set is only concerned with unique elements! We can cast a list with multiple repeat elements to a set to get the unique elements. For example:
# Create a list with repeats
list1 = [1,1,2,2,3,4,5,6,1,1]
# Cast as set to get unique values
set(list1)
Python comes with Booleans (with predefined True and False displays that are basically just the integers 1 and 0). It also has a placeholder object called None. Let's walk through a few quick examples of Booleans (we will dive deeper into them later in this course).
# Set object to be a boolean
a = True
#Show
a
We can also use comparison operators to create booleans. We will go over all the comparison operators later on in the course.
# Output is boolean
1 > 2
We can use None as a placeholder for an object that we don't want to reassign yet:
# None placeholder
b = None
# Show
print(b)
Thats it! You should now have a basic understanding of Python objects and data structure types.