In this tutorial, we will learn about the Set in Python. Its types, and how to use them with the help of examples
Set is use to store the group of unique object (duplicates are not allow). Declare the set data by using curly brasses { }. Set is mutable allows modifications. A Set insertion order is not preserved, indexing is not support. Heterogeneous elements are allow. We can represent set elements within curly braces and with comma separated. We can apply mathematical operations like union, intersection, difference etc on set
objects.
Creating a Set
A Creating a Set# integer type roll = {2, 4, 6, 8, 10} print('Roll numder:', roll) # string type letters = {'b', 'a', 's', 'i', 'c'} print('Letter:', letters) # mixed data types key = {'Basic', 12, -12, 'Engineer'} print('mixed data types:', key)
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Python Set Method
| Method | Description |
| add() | It adds an item to the set. It has no effect if the item is already present in the set |
| clear() | It deletes all the items from the set. |
| copy() | It returns a shallow copy of the set. |
| discard() | It removes the specified item from the set. |
| intersection() | It returns a new set that contains only the common elements of both the sets. |
| intersection_update() | It removes the items from the original set that are not present in both the sets |
| Isdisjoint() | Return True if two sets have a null intersection. |
| Issubset() | Report whether another set contains this set. |
| Issuperset() | Report whether this set contains another set. |
| pop() | Remove and return an arbitrary set element that is the last element of the set. Raises KeyError if the set is empty. |
| remove() | Remove an element from a set; it must be a member. If the element is not a member, raise a KeyError. |
| union() | Return the union of sets as a new set. |
| update() | Update a set with the union of itself and others. |
Example of set method in Python
A Example of set method in Python# add basic = {'b', 's', 'i','c'} basic.add('a') print("Letters are:",basic) #remove def Remove(key): key.discard(1) print (key) key = set([1, 2, 3, 1, 4, 1]) Remove(key) #pop a = {1, 2, 3} a.pop() print(a) #copy a1 = {1, 2, 3, 4} a2 = a1.copy() print(a2) #union A = {2, 4, 6, 8} B = {4, 8, 12, 16} print("A U B:", A.union(B)) #intersection x1 = {2, 4, 6,8} x2 = {2, 8, 9} print(x1.intersection(x2))
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