Tuples in Python Class 11 Notes

Tuples :

A tuple is an ordered sequence of elements of different data types, such as integer, float, string or list. Elements of a tuple are enclosed in parenthesis(round brackets) and are separated by commas. for example :

>>> a = (1, ‘a’, 7, 6.5) # a is the tuple of mixed data type

>>> b = (2, 4, 6, 8, 10) # b is a tuple of only integers

>>> c = (“English”, “Hindi”, “Math”, “Science”) # c is a tuple of only string

>>> d = (2, 4, 7, [4, 5, 6]) # d is a tuple with list as an element

If there is only a single element in a tuple then the element should be followed by a comma, otherwise it will be treated as integer instead of tuple. for example

NOTE : A sequence without parentheses is treated as tuple by default

>>> a = 9, 8, 7, 6, 5

>>> type(a)

<class ‘tuple’>

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. for example

>>> a = (‘C’ , ‘ O’ , ‘M’ , ‘P’ , ‘U’ , ‘T’ , ‘E’ , ‘R’)

>>> a[4] # Output is U (fifth element of tuple)

>>> a[7] # Output is R (Eighth element of tuple)

>>> a[-1] # Output is R (last element of tuple or first element from right)

>>> a[9] # Output is IndexError: tuple index out of range

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. for example :

>>> a = (‘C’ , ‘ O’ , ‘M’ , ‘P’ , ‘U’ , ‘T’ , ‘E’ , ‘R’)

>>> a[2] = ‘S’

TypeError: ‘tuple’ object does not support item assignment.

Difference between List and Tuple :

Tuple Operations : Various operations of tuple are done by various operators. like

Tuple Methods and Built-in Functions :

Tuple Assignment :

It allows a tuple of variables on the left side of the assignment operator to be assigned respective values from a tuple on the right side. The number of variables on the left should be same as the number of elements in the tuple. for example

>>>(n1,n2) = (5,9)

>>>print(n1)

5

print(n2)

9

>>>(a,b,c,d) = (5,6,8) #values on left side and right side are not equal
ValueError: not enough values to unpack

Nested Tuples :

A tuple inside another tuple is called a nested tuple. In nested tuples we can access the elements in the same way of nested list. for example

>>>t1 = ((“Amit”, 90), (“Sumit”, 75), (“Ravi”, 80))
>>>t1[0]
(‘Amit’, 90)
>>>t1[1]
(‘Sumit’, 75)
>>>t1[1][1]
75

Tuples in Python Class 11 Notes

Practice Questions : Click for complete NCERT Solution

Q1. Consider the following tuples, tuple1 and tuple2: (from NCERT)
tuple1 = (23,1,45,67,45,9,55,45)
tuple2 = (100,200)

Find the output of the following statements:
i. print(tuple1.index(45))

ii. print(tuple1.count(45))

iii. print(tuple1 + tuple2)

iv. print(len(tuple2))

v. print(max(tuple1))

vi print(min(tuple1))

vii. print(sum(tuple2))

viii. print ( sorted ( tuple1 ) )
print(tuple1)

Q2. What advantages do tuples have over lists? (from NCERT)

Tuples in Python Class 11 Notes

Programming Questions (from NCERT)

Click for complete NCERT Solution

Q1. Write a program to read email IDs of n number of students and store them in a tuple. Create two new tuples, one to store only the usernames from the email IDs and second to store domain names from the email ids. Print all three tuples at the end of the
program. [Hint: You may use the function split()]

Show Answer
Ans. 

n=int(input("Enter how many email id to enter  : "))
t1=()
un = ()
dom = ()
for i in range(n):
   em = input("Enter email id  : ")
   t1 = t1 + (em,)
for i in t1:
   a = i.split('@')
   un = un + (a[0],)
   dom = dom + (a[1],)
print("Original Email id's are  : " , t1)
print("Username are  : " , un)
print("Doman name are  : " , dom)

OUTPUT : 

Enter how many email id to enter  : 2
Enter email id  : csip@gmail.com
Enter email id  : bike@yahoo.com
Original Email id's are  :  ('csip@gmail.com', 'bike@yahoo.com')
Username are  :  ('csip', 'bike')
Doman name are  :  ('gmail.com', 'yahoo.com')

Q2. Write a program to input names of n students and store them in a tuple. Also, input a name from the user and find if this student is present in the tuple or not.

We can accomplish these by:
(a) writing a user defined function
(b) using the built-in function

Show Answer
Ans. a)

def searchname(t1,nm):
   for a in t1:
     if a == nm:
       print(nm , " Name is present in Tuple")
       return
   print("Name not found")
n = int(input("How many names you want to enter  : "))
name = ()
for i in range(n):
   nm = input("Enter name  : ")
   name = name + (nm,)
nm = input("Enter name to search  : ")
searchname(name, nm)

OUTPUT

How many names you want to enter  : 3
Enter name  : Amit
Enter name  : Anuj
Enter name  : Ashish
Enter name to search  : Anuj
Anuj  Name is present in Tuple

Ans b)

n = int(input("How many names you want to enter  : "))
name = ()
for i in range(n):
   nm = input("Enter name  : ")
   name = name + (nm,)
nm = input("Enter name to search  : ")
if nm in name:
   print(nm," Name is present in Tuple")
else:
     print(nm," Name is not present in Tuple")

OUTPUT:

How many names you want to enter  : 3
Enter name  : Amit
Enter name  : Anuj
Enter name  : Ashu
Enter name to search  : Ashu
Ashu  Name is present in Tuple

Tuples in Python Class 11 Notes

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Tuples in Python Class 11 Notes

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