Tuple data types in Python

1. UNIT III
Dr. M Vishnu Vardhan
Asst. Prof, Dept. of AIML

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TUPLE DATA TYPE
Tuples are used to store multiple items in a single variable
A tuple is a collection items which is ordered ,unchangeable and
immutable.
Any number of items and they may be of any type.
It allows duplicate values and can have any number of elements.
A tuple in Python can be created by enclosing all the comma-
separated elements inside the parenthesis ().
Syntax: variable_name=(data1,data2,data3….)
Main difference between LIST and TUPLE is we cannot change
the elements of the tuple once it is assigned.

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CREATING TUPLE:
Create a tuple to hold your 10th
class marks
Create a tuple with 5 of your friends
Empty tuple?: list without any items is called empty tuple
Can we keep one tuple inside another tuple?
Yes also known as nested tuple or multidimensional tuple
Tuples can also be created without parenthesis
 what if we have only one item in the tuple ?
• We need to put comma to make it as a tuple

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ACCESSING TUPLE ELEMENTS SAME AS A LIST
By using Indexing and slicing.
Can access individual characters using indexing and range of
characters using slicing.
Nested tuples are accessed using nested indexing
CHANGING TUPLE
Tuples are immutable
Elements of a tuple cannot be changed once they are assigned
but if the element itself is a mutable data type like list , then it
can be changed by using type casting.

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DELETING A TUPLE
Since tuples are immutable , we can’t delete elements
from it.
Instead , we can delete entire tuple using del keyword.
CONVERTING A LIST TO TUPLE
 list can be converted to tuple
 tuple(list_name)
Concatenation & repeating tuples
Concatenation(+)
Repeating (*)

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Built –In Functions And Methods
Length – len(tuple)
Membership--- in / not in
Iterative statements ---- for element in a
print(element)
Maximum----max(a)
Minimum-----min(a)
index(value)– a.index(value)---Returns index of the given value
Count(value)– a.count(value)---Returns the frequently occurrence
of a specified value
Conversion of tuple----tuple(“hello”)-----(‘h’,’e’,’l’,’l’,’o’)
tuple(list)-----(1,2,3,4)

7. Creating Tuples
# Empty tuple
t1 = ()
# Tuple with integers
t2 = (1, 2, 3, 4)
# Tuple with mixed data types
t3 = (10, "apple", 3.14, True)
# Nested tuple
t4 = (1, (2, 3), [4, 5])
# Tuple without parentheses (comma is enough)
t5 = 10, 20, 30

8. Accessing Tuple Elements
t = (10, 20, 30, 40, 50)
print(t[0]) # First element → 10
print(t[-1]) # Last element → 50
print(t[1:4]) # Slicing → (20, 30, 40)

9. Tuple Operations
t1 = (1, 2, 3)
t2 = (4, 5)
# Concatenation
print(t1 + t2) # (1, 2, 3, 4, 5)
# Repetition
print(t1 * 2) # (1, 2, 3, 1, 2, 3)
# Membership
print(2 in t1) # True
print(10 in t1) # False

10. Tuple Methods
t = (1, 2, 2, 3, 4, 2)
print(t.count(2)) # Count occurrences of 2 → 3
print(t.index(3)) # Index of first occurrence of 3 →
3

11. Tuple Packing and Unpacking
# Packing
person = ("Alice", 25, "Engineer")
# Unpacking
name, age, job = person
print(name) # Alice
print(age) # 25
print(job) # Engineer

12. Immutability of Tuples
t = (1, 2, 3)
# Trying to modify will cause an error
# t[0] = 100 ❌ TypeError: 'tuple' object does not
support item assignment

13. Tuple with Mutable Elements
t = (1, [2, 3], 4)
t[1][0] = 99 # Allowed because list inside tuple
is mutable
print(t) # (1, [99, 3], 4)