Tuples in Python Class 11 Notes

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Teachers and Examiners (CBSESkillEduction) collaborated to create the Tuples in Python Class 11 Notes. All the important Information are taken from the NCERT Textbook Computer Science (083) class 11.

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Tuples in Python Class 11 Notes

Introduction to Tuples

An ordered collection of components of various data kinds, such as integer, float, string, list, is known as a tuple. A tuple’s components are denoted by parenthesis (round brackets) and commas. A tuple’s elements can be retrieved using index values beginning at 0 just like list and string members can.

Example 1 –
>>> tuple1 = (1,2,3,4,5)
>>> tuple1
(1, 2, 3, 4, 5)

Example 2 –
>>> tuple2 =(‘Economics’,87,’Accountancy’,89.6)
>>> tuple2
(‘Economics’, 87, ‘Accountancy’, 89.6)

Example 3 –
>>> tuple3 = (10,20,30,[40,50])
>>> tuple3
(10, 20, 30, [40, 50])

Example 4 –
>>> tuple4 = (1,2,3,4,5,(10,20))
>>> tuple4
(1, 2, 3, 4, 5, (10, 20))

Tuples in Python Class 11 Notes

Accessing Elements in a Tuple

Elements of a tuple can be accessed in the same way as a list or string using indexing and slicing.

Example 1 –
>>> tuple1 = (2,4,6,8,10,12)
>>> tuple1[0]
2

Example 2 –
>>> tuple1 = (2,4,6,8,10,12)
>>> tuple1[3]
8

Example 3 –
>>> tuple1 = (2,4,6,8,10,12)
>>> tuple1[15]
IndexError: tuple index out of range

Example 4 –
>>> tuple1 = (2,4,6,8,10,12)
>>> tuple1[1+4]
12

Example 5 –
>>> tuple1 = (2,4,6,8,10,12)
>>> tuple1[-1]
12

Tuples in Python Class 11 Notes

Tuple is Immutable

Tuple is an immutable data type. It means that the elements of a tuple cannot be changed after it has been created. An attempt to do this would lead to an error.

Example –
>>> tuple1 = (1,2,3,4,5)
>>> tuple1[4] = 10
TypeError: ‘tuple’ object does not support item assignment

Tuple Operations

Concatenation

Python allows us to join tuples using concatenation operator depicted by symbol +.

Example –
>>> tuple1 = (1,3,5,7,9)
>>> tuple2 = (2,4,6,8,10)
>>> tuple1 + tuple2
(1, 3, 5, 7, 9, 2, 4, 6, 8, 10)

Repetition

Repetition operation is depicted by the symbol *. It is used to repeat elements of a tuple.

Example –
>>> tuple1 = (‘Hello’,’World’)
>>> tuple1 * 3
(‘Hello’, ‘World’, ‘Hello’, ‘World’, ‘Hello’, ‘World’)

Tuples in Python Class 11 Notes

Membership

The in operator checks if the element is present in the tuple and returns True, else it returns False.

Example 1 –
>>> tuple1 = (‘Red’,’Green’,’Blue’)
>>> ‘Green’ in tuple1
True

Example 2 –
>>> tuple1 = (‘Red’,’Green’,’Blue’)
>>> ‘Green’ not in tuple1
False

Slicing

Like string and list, slicing can be applied to tuples also.

Example –
>>> tuple1 = (10,20,30,40,50,60,70,80)
>>> tuple1[2:7]
(30, 40, 50, 60, 70)

Tuples in Python Class 11 Notes

Tuple Methods and Built-in Functions

Python provides many functions to work on tuples.

len()

Returns the length or the number of elements of the tuple passed as the argument.

Example –
>>> tuple1 = (10,20,30,40,50)
>>> len(tuple1)
5

tuple()

Creates an empty tuple if no argument is passed, if a sequence is passed as argument.

Example 1 –
>>> tuple1 = tuple()
>>> tuple1
( )

Example 2 –
>>> tuple1 = tuple(‘aeiou’)
>>> tuple1
(‘a’, ‘e’, ‘i’, ‘o’, ‘u’)

count()

Returns the number of times the given element appears in the tuple

Example –
>>> tuple1 = (10,20,30,10,40,10,50)
>>> tuple1.count(10)
3
>>> tuple1.count(90)
0

index()

Returns the index of the first occurrence of the element in the given tuple.

Example –
>>> tuple1 = (10,20,30,40,50)
>>> tuple1.index(30)
2
>>> tuple1.index(90)
ValueError: tuple.index(x): x not in tuple

sorted()

Takes elements in the tuple and returns a new sorted list. It should be noted that, sorted() does not make any change to the original tuple.

Example –
>>> tuple1 = (“Rama”,”Heena”,”Raj”, “Mohsin”,”Aditya”)
>>> sorted(tuple1)
[‘Aditya’, ‘Heena’, ‘Mohsin’, ‘Raj’, ‘Rama’]

min()

Returns minimum or smallest element of the tuple.

Example –
>>> tuple1 = (19,12,56,18,9,87,34)
>>> min(tuple1)
9

max()

Returns maximum or largest element of the tuple

Example –
>>> tuple1 = (19,12,56,18,9,87,34)
>>> max(tuple1)
87

sum()

Returns sum of the elements of the tuple.

Example –
>>> tuple1 = (19,12,56,18,9,87,34)
>>> sum(tuple1)
235

Tuple Assignment

Python has a useful feature called assignment of tuples. It enables the assignment of appropriate values to a tuple of variables on the left side of the assignment operator from a tuple on the right side. The left-hand side variables should have the same amount of components as the tuple.

Example 1 –
>>> (num1,num2) = (10,20)
>>> print(num1)
10
>>> print(num2)
20

Example 2 –
>>> record = ( “Pooja”,40,”CS”)
>>> (name,rollNo,subject) = record
>>> name
‘Pooja’
>>> rollNo
40
>>> subject
‘CS’

Nested Tuples

A nested tuple is one that contains another tuple inside of it. Students’ names, roll numbers, and grades (in percentage) are saved in a tuple. We can create a nested tuple to contain the information of many of these students.

Example –
st=((101,”Aman”,98),(102,”Geet”,95),(103,”Sahil”,87),(104,”Pawan”,79))
print(“S_No”,” Roll_No”,” Name”,” Marks”)
for i in range(0,len(st)):
     print((i+1),’\t’,st[i][0],’\t’,st[i][1],’\t’,st[i][2])

Output:
S_No Roll_No Name Marks
1 101 Aman 98
2 102 Geet 95
3 103 Sahil 87
4 104 Pawan 79

Computer Science Class 11 Notes
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