Code

demo1.py

# use {} create a set
# setname = {element1, element2, ... elementN}
# For example
S1 = {1,2,3,3,4,4}
print(S1)

# use set() create a set
# Convert iterable objects such as strings, lists, tuples, and range objects
# into set
# If you want to create an empty set, you can only use the set() function to do so.
S2 = set([1,2,3,4,4,4])

print(S2)

demo2.py

S = set([1,2,3,4,5,5,6,6,7,8,9,9])

for i in S:
    print(i, end=' ')

demo3.py

x = {"apple", "banana", "cherry"}
y = {"google", "microsoft", "apple"}

x.update(y)

print(x)

demo4.py

thisset = {"apple", "banana", "cherry"}

thisset.update("apple")

print(thisset)

demo5.py

thisset = {"apple", "banana", "cherry"}

thisset.add("apple")

print(thisset)

demo6.py

thisset = {"apple", "banana", "cherry"}

thisset.add("apple")

print(thisset)

demo7.py

fruits = {"apple", "banana", "cherry"}

fruits.remove("banana")

print(fruits)