Nested Tuples0%
Sets Introduction

Nested Tuples

Beginner8 min read•Updated: 2026-09-03
Study Materials

Nested Tuples

Tuples can contain other tuples or even mutable collections like lists.

Key Concepts & Detailed Explanation

Crucial concept: A tuple is immutable in terms of its references. If a tuple contains a mutable object (such as a list), the contents of that inner list CAN be modified!

Code Examples & Output

Python
# Tuple containing lists
student_record = ("Vikram", [85, 90, 92])
print("Original:", student_record)
 
# The list INSIDE the tuple can be mutated!
student_record[1].append(95)
print("After adding mark:", student_record)
 
# Nested coordinates
grid = (
(0, 0),
(0, 1),
(1, 0),
(1, 1)
)
print("Top-right coordinate:", grid[1])

Expected Output:

Output
Original: ('Vikram', [85, 90, 92])
After adding mark: ('Vikram', [85, 90, 92, 95])
Top-right coordinate: (0, 1)

Best Practices & Common Pitfalls

If you want 100% true immutability all the way down, ensure nested elements are also tuples or primitives.

Practice Quiz

1. Can you modify a list that is placed inside a tuple?

  • A) No, tuple makes all children immutable
  • B) Yes, the list itself remains mutable
  • C) Only with copy()
  • D) Only in Python 2
Answer: B Explanation: The tuple only locks its references; the list referenced inside is still mutable.

2. How do you access the value 4 in 't = ((1, 2), (3, 4))'?

  • A) t[1][1]
  • B) t[1, 1]
  • C) t(1)(1)
  • D) t[4]
Answer: A Explanation: t[1][1] accesses the second element of the second inner tuple.

Practice Challenge

Create a nested tuple representing 3 books with (Title, Author, Year) and print each book's title.

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