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Immutability of Tuple

  • This lesson explains why tuple values cannot be changed after creation in Python.

  • What is Immutability in Tuple?

    Immutability means the data cannot be changed after it is created.

    In Python, tuples are immutable, which means:

    • You cannot add

    • You cannot remove

    • You cannot modify elements inside a tuple

    Once a tuple is created, it stays the same.

    Daily Life Example

    Think of:

    • A roll number of a student — once assigned, it doesn't change

    • Date of birth — fixed information

    • Car registration number — permanent

    Tuples store data like this — fixed and secure.

Creating a Tuple 

numbers = (10, 20, 30, 40)
print(numbers)

  • Explanation

    Tuple is created using parentheses ()
    Values are stored in order

Trying to Modify Tuple (Not Allowed) 

numbers = (10, 20, 30)
numbers[1] = 99

  • Explanation

    This gives an error:

    TypeError: 'tuple' object does not support item assignment

    Because tuples are immutable.

Trying to Add Elements (Not Allowed) 

numbers = (1, 2, 3)
numbers.append(4)

  • Explanation

    Error occurs because tuples do not have append() method.

Trying to Remove Elements (Not Allowed) 

numbers = (5, 6, 7)
del numbers[1]

  • Explanation

    Error → Tuples cannot delete individual items.

    What is Allowed in Tuple?

    • Accessing elements

    • Looping

    • Counting

    • Indexing

    • Nested mutable objects can change

Nested Mutable Object 

data = (1, 2, [3, 4])
data[2][0] = 99
print(data)

  • Explanation

    Tuple itself is immutable,
     but the list inside tuple can change.
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