Sets in Python

'''

Python Sets:

In Python, a set is an unordered collection of unique elements. 

Sets are useful when we need to store a collection of items without any duplicates.

Key Characteristics of Sets:

1. Unordered: The items have no defined order, and their position can change.

2. Unique Elements: No duplicate values are allowed.

3. Mutable: Sets can be modified after creation (elements can be added or removed).

4. Heterogeneous: A set can contain elements of different data types.

'''

s1 = {1, 2, 3, 4}

print(s1)                #output = {1, 2, 3, 4}

s2 = {1, 1, 2, 3, 4, 4}

print(s2)                #output = {1, 2, 3, 4}  

#Duplicates are automatically removed

info = {"Sindhu", 24, True, 2002}

print(info)              #output = {24, True, 2002, 'Sindhu'} 

#Here we can see that the items in set occur in random order, and hence they cannot be accessed using index numbers.

#info[0]                  #output = Typeerror: 'set' object is not subscriptable

harry = {}               #An empty set

print(type(harry))       #output = <class 'dict'>

harry1 = set()

print(type(harry1))      #output = <class 'set'>

'''

Accessing Set Items:

We can access the items of set using a for-loop.

'''

for value in info:

    print(value)

#output = 24

        #     True

        #     2002

        #     Sindhu