Chapter 13 Tuples.pptx

Computational Thinking and Programming
XI
Computer Science
(083)
Board : CBSE
Courtesy CBSE

After studying this lesson,
students will be able to:
Understand the need of Tuples;
Solve problems by using Tuples;
 Get clear idea about Tuple functions;
and
Understand the difference between
list, dictionary and tuples.
LEARNING OUTCOMES

A tuple is a sequence of values,
which can be of any type and they are
indexed by integer. Tuples are just like list,
but we can’t change values of tuples in
place. Thus tuples are immutable.
The index value of tuple starts from 0.
A tuple consists of a number of values
separated by commas. For example:
>>> T=10, 20, 30, 40
>>> print (T)
(10, 20, 30, 40)
WHAT IS TUPLE?

ACCESSING TUPLE USING
LOOPS
OUTPUT

REMOVING A TUPLE
You cannot remove or delete or
update items in a tuple.
Tuples are unchangeable, so you
cannot remove items from it, but you can
delete the tuple completely:
NOTE: TUPLES ARE
IMMUTABLE

TUPLE METHODS
Python provides two built-in
methods that you can use on tuples.
1. count() Method
2. index() Method

TUPLE METHODS
1. count() Method
Return the number of times the value
appears in the tuple Count()
method
returns
total no
times
‘banana’
present in
the given
tuple

TUPLE METHODS
2. index() Method
index() Method returns index
of “banana” i.e 1
index()
Method

DIFFERENCE BETWEEN
LIST AND TUPLE

DIFFERENCE BETWEEN LIST AND TUPLE
LIST TUPLE
Syntax for list is
slightly different
comparing with tuple
Syntax for tuple is
slightly different
comparing with lists
Weekdays=[‘Sun’,’Mo
n’, ‘wed’,46,67]
type(Weekdays)
class<‘lists’>
twdays = (‘Sun’, ‘mon',
‘tue', 634)
type(twdays)
class<‘tuple’>
List uses [ and ]
(square brackets) to
bind the elements.
Tuple uses rounded
brackets( and ) to bind
the elements.

DIFFERENCE BETWEEN LIST AND TUPLE
LIST TUPLE
List can be edited once
it is created in python.
Lists are mutable data
structure.
A tuple is a list which one
cannot edit once it is
created in Python code.
The tuple is an
immutable data structure
More methods or
functions are
associated with lists.
Compare to lists tuples
have Less methods or
functions.

DIFFERENCE BETWEEN
TUPLE AND DICTIONARY

DIFFERENCE BETWEEN TUPLE AND
DICTIONARY
TUPLE DICTIONARY
Order is maintained. Ordering is not
guaranteed.
They are immutable Values in a dictionary can
be changed.
They can hold any
type, and types can be
mixed.
Every entry has a key and
a value

DIFFERENCE BETWEEN TUPLE AND
DICTIONARY
TUPLE DICTIONARY
Elements are accessed
via numeric (zero
based) indices
Elements are accessed
using key's values
There is a difference in
syntax and looks easy
to define tuple
Differ in syntax, looks bit
complicated when
compare with Tuple or
lists

PROGRAMS ON TUPLE
BELLOW AVERAGE
PROGRAMS

1. Write a Python program to create a tuple.
#Create an empty tuple
x = ()
print(x)
#Create an empty tuple with tuple() function
#built-in Python
tuplex = tuple()
print(tuplex)
TUPLE - BELLOW AVERAGE
PROGRAMS

2. Write a Python program to create a tuple
with
different data types
#Create a tuple with different data types
tuplex = ("tuple", False, 3.2, 1)
print(tuplex)
PROGRAMS

3. Write a Python program to unpack a tuple
in several variables
#create a tuple
tuplex = 4, 8, 3
print(tuplex)
n1, n2, n3 = tuplex
#unpack a tuple in variables
print(n1 + n2 + n3)
#the number of variables must be equal to
the number of items of the tuple
n1, n2, n3, n4= tuplex
PROGRAMS

4 Write a Python program to find the index
of an item of a tuple.
#create a tuple
tuplex = tuple("index tuple")
print(tuplex)
#get index of the first item whose value is
passed as parameter
index = tuplex.index("p")
print(index)
#define the index from which you want to
search
index = tuplex.index("p", 5)
TUPLE - AVERAGE PROGRAMS

print(index)
#define the segment of the tuple to be
searched
index = tuplex.index("e", 3, 6)
print(index)
#if item not exists in the tuple return
ValueError Exception
index = tuplex.index("y")

5. Write a Python program to add an item in
a tuple.
#create a tuple
tuplex = (4, 6, 2, 8, 3, 1)
print(tuplex)
#tuples are immutable, so you can not add
new elements
#using merge of tuples with the + operator
you can add an element and it will create a
new tuple
tuplex = tuplex + (9,)
print(tuplex)

5. Write a Python program to add an item in
a tuple.
#adding items in a specific index
tuplex = tuplex[:5] + (15, 20, 25) + tuplex[:5]
print(tuplex)
#converting the tuple to list
listx = list(tuplex)
#use different ways to add items in list
listx.append(30)
tuplex = tuple(listx)
print(tuplex)

TUPLE – CLASS WORK/ HOME WORK
PROGRAMS

6. Write a Python program to convert a tuple
to a string.
7. Write a Python program to get the 4th
element and 4th element from last of a
tuple.
8. Write a Python program to find the
repeated items of a tuple.
9. Write a Python program to check whether
an element exists within a tuple.

Class Test
Time: 40 Min Max Marks: 20
1. What is tuple? give example? 02
2. Write a python script to access a tuple? 05
3. Explain 2 built in methods of?
dictionary? 10
1. Differentiate between tuple and list? 05

Chapter 13 Tuples.pptx

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Chapter 13 Tuples.pptx