"""

add() Adds an element to the set

clear() Removes all the elements from the set

copy() Returns a copy of the set

difference() Returns a set containing the difference between two or more sets

difference_update() Removes the items in this set that are also included in another, specified set

discard() Remove the specified item

intersection() Returns a set, that is the intersection of two other sets

intersection_update() Removes the items in this set that are not present in other, specified set(s)

isdisjoint() Returns whether two sets have a intersection or not

issubset() Returns whether another set contains this set or not

issuperset() Returns whether this set contains another set or not

pop() Removes an element from the set

remove() Removes the specified element

symmetric_difference() Returns a set with the symmetric differences of two sets

symmetric_difference_update() inserts the symmetric differences from this set and another

union() Return a set containing the union of sets

update() Update the set with the union of this set and others

"""

# how to define set

set_variable = set((1,2,3))

set_variable_2 = {1,2,3}

set_variable_3 = set([1,2,3])

print (type(set_variable),type(set_variable_2),type(set_variable_3))

set_variable.add(4)

set_variable.add((5,6))

# set_variable.add([7,8]) # not allowed

set_variable_2.clear()

print (set_variable_2)

print (set_variable)

print (set_variable.difference(set_variable_3))

set_variable.difference_update(set_variable_3)

print (set_variable)

set_variable.discard((5,6))

print (set_variable)

set_variable.remove(4) # pop is also method to remove element

print (set_variable)

set_variable = set((1,2,3))

set_variable_2 = {1,2,3,4,5,6}

print (set_variable.intersection(set_variable_2))

set_variable.intersection_update(set_variable_2)

print (set_variable)

set_variable.update(set_variable_2)

print (set_variable)

set_variable.union(set_variable_2)

print (set_variable)