Sets

# Sets can store multiple values in one variable
# Sets can't be ordered and don't allow duplicate values 
# Sets can't use indexes 

# Define a set 
set1 = {"a", "b", "c"}
set2 = set(("b", 1, False))

# Add new items to set 
set1.add("d")

# Combine or update sets, you can use both sets and lists
set3.update(set4)
set4.update(list1)

# Create new set with a union of sets 
set6 = set4.union(set5)

# Remove value from set - if it isn't there you will get an error  
set4.remove(4)

# Discard will remove the item but without an error if value isn't there 
set4.discard(4)

# Only use pop when you don't care about the order of the data 
set1.pop()