Python - {Set}

set{}

It can be denoted as curly braces{1,2,3} with value. It is a mutable data type . Its used to store multiple item in single variable.

Mutable > Can change or modify the value once created .

Immutable > Cannot change or modify the value once defined.

In sets there will be no duplicate value and the value can be unordered.

Common operations

s.add(4) # To add value

s.remove(2) # To remove the value in set

s.discard(99) # safe remove — no error if missing

s.pop() # Remove & return values from collection

s.clear() # Clear all the values from the set

Example

set = {1, 2, 3}



print("values:", set)



set.add(4)

print("Add 4:", set)



set.remove(2)

print("Remove 2:", set)



set.discard(99)

print("Discard 99:", set)



print("Pop value:", set.pop())

print("After pop:", set)



set.clear()

print("After clear:", set)

Output:

value: {1, 2, 3}

Add 4: {1, 2, 3, 4}

Remove 2: {1, 3, 4}

Discard 99: {1, 3, 4}

Pop value: 1

After pop: {3, 4}

After clear: set()

set operations:

if a & b are

a = {1, 2, 3, 4}

b = {3, 4, 5, 6}

Reference:

()

(https://www.geeksforgeeks.org/python/sets-in-python/)