Set Functions

Various built-in functions are available in Python which helps to perform multiple operations on sets. Below are the top must know set methods in python

Length Function

This function helps to return the length of the given set

#Length Method
month_list = {"Jan", "Feb", "Mar", "Apr", "May"}
print("Length of given set is: {}".format(len(month_list)))

Output

Length of given set is: 5

Set Union

This helps to returns the union results of two sets

#Set Union
month_list_old = {"Jan", "Feb", "Mar"}
month_list_new = {"Jan", "Feb", "Apr"}
print("The union result of given two sets are")
print(month_list_old | month_list_new)

Output

The union result of given two sets are
{'Apr', 'Feb', 'Mar', 'Jan'}

Set Intersection

This helps to return the intersection results of given sets

#Set Intersection
month_list_old = {"Jan", "Feb", "Mar"}
month_list_new = {"Jan", "Feb", "Apr"}
print("The intersection result of given two sets are")
print(month_list_old & month_list_new)

Output

The intersection result of given two sets are
{'Jan', 'Feb'}

Set Difference

This helps to return the set difference of one set from another set

#Set Difference
month_list_old = {"Jan", "Feb", "Mar"}
month_list_new = {"Jan", "Feb", "Apr"}
print("The set difference of one set from another set is")
print(month_list_old - month_list_new)

Output

The set difference of one set from another set is
{'Mar'}

Set symmetric Difference

This return the element which is available in any one of the given set. If it is available in both set, it won't return as result

#Set Symmetric Difference
month_list_old = {"Jan", "Feb", "Mar"}
month_list_new = {"Jan", "Feb", "Apr"}
print("The set symmetric difference is :")
print(month_list_old ^ month_list_new)

Output

The set symmetric difference is :
{'Mar', 'Apr'}

Clear Method

This method removes all the element in given set and make it as empty set

#Clear Set Method
month_list = {"Jan", "Feb", "Mar"}

month_list.clear()
print("The clear set result is :")
print(month_list)

Output

The clear set result is :
set()

Pop Method

This method helps the remove the random value from the given set

#POP Method
month_list = {"Jan", "Feb", "Mar"}

month_list.pop()
print("The POP method removes random value :")
print(month_list)

Output

The POP method removes random value :
{'Jan', 'Feb'}

Note: Since POP method removes value randomly from given set, you may end up in different output

Isdisjoint Method

This method returns true if both sets not have any common element

#Isdisjoint Method
month_list_old = {"Jan", "Feb", "Mar"}
month_list_new = {"Apr", "May", "Jun"}

print("Isdisjoint method result is :")
print(month_list_old.isdisjoint(month_list_new))

Output

Isdisjoint method result is :
True

Issubset Method

This method returns true if all element of given set is present in the another set

#Issubset Method
month_list_old = {"Jan", "Feb", "Mar"}
month_list_new = {"Jan", "Feb", "Mar", "Apr", "May", "Jun"}

print("Issubset method result is :")
print(month_list_old.issubset(month_list_new))

Output

Issubset method result is :
True

Issuperset Method

This method returns true if the given set have all the element of another set

#Issuperset Method
month_list_old = {"Jan", "Feb", "Mar"}
month_list_new = {"Jan", "Feb", "Mar", "Apr", "May", "Jun"}

#Return False - only 3 elements are present, remaining items missed
print(month_list_old.issuperset(month_list_new))

#Return True - all items are present in month_list_new
print(month_list_new.issuperset(month_list_old))

Output

False
True