introduction to tuple,declaration / initialization of tuples,

1. TUPLE IN PYTHON
COMPUTER SCIENCE(083)
XII

2. What is tuple?:
A tuple is a collection of values or an ordered sequence of values
similar to list.
Elements of a tuple enclosed in a parenthesis ( ), separated by
commas (,) .
Syntax:
tuple_name= (value1, value2,……..,valueN)
Example:
tup = (10, 20, 30, 40, 50 )

3. HOW TO CREATE AND INITIALIZE TUPLE
Method 1: If tuple is declare empty.
tup1=( )
Method 2: Initialize tuple with value:
If we want to store the numbers in a tuple.
tup2= (1, 2, 30, 4, 15)
If we want to store the words or string in a tuple.
tup3= (‘MON’, ‘TUE’, ’WED’, ’THU’)

4. HOW TO CREATE AND INITIALIZE TUPLE
Example: If we want to store the characters in a tuple.
tup4= (‘A’,’E’,’I’,’O’,’U’)
Example: If we want to store the mixed information in a tuple.
tup4= (“Kapil”, 13,”Class-IX”, 40)

5. TO DISPLAY THE TUPLE
Example:
tup2= (10, 20, 30, 40, 50)
print(tup2)
----------------Output-------------
(10, 20, 30, 40, 50)
Example:
tup= (“Mango”, “Apple”,”Grapes”,”Oranges”)
print(tup)
----------------Output-------------
(‘Mango’, ‘Apple’, ’Grapes’, ’Oranges’)

6. HOW TO CREATE AND INITIALIZE THE TUPLE
USING TUPLE() CONSTRUCTOR
Syntax:
tuple_name=tuple(sequence or string)
Example:
tup1=tuple()
Print(tup1)
----------output----------
( )
tup4= tuple((‘A’,’E’,’I’,’O’,’U’))
print(tup4)
If we want to store the characters in a list
tup4= tuple(“AEIOU”)
print(tup4)
---------Output----------
(‘A’, ‘E’,’I’,’O’,’U’)

7. HOW TO CREATE AND INITIALIZE THE TUPLE
USING TUPLE() CONSTRUCTOR
Example:
If we want to store the mixed information in a list.
tup4= tuple((“Kapil”, 13,”Class-IX”, 40))
print(tup4)
----------------Output-------------
(‘Kapil’, 13,’Class-IX’, 40)
Example: If we want to store the numbers in a tuple.
tup2=tuple((10, 20, 30, 40, 50))
print(tup2) ----------------Output-------------
(10, 20, 30, 40, 50)

8. HOW USER ENTER THE VALUES IN A TUPLE
AT RUN TIME.

9. We can use eval( ) method, which identifies the data type
and evaluate them automatically.
Example:
no=eval(input(“Enter the no:”))
print(no)
-------Input-----------
Enter the no: 1,2,3,4,5,6,7,8,9
-----------Output-------------
(1,2,3,4,5,6,7,8,9)

10. Example:
tup1=()
x=1
while x<=5:
no=int(input(“Enter the no:”))
tup1=tup1+(no,)
x=x+1
print(tup1)
====OUTPUT=====
Enter the no:10
Enter the no:20
Enter the no:30
Enter the no:40
Enter the no:50
(10, 20, 30, 40, 50)

11. Accessing Tuple Elements
Example: Let’s store no’s in a tuple
no=(10,20,30,40,50,60,70,80)
0 1 2 3 4 5 6 7
10 20 30 40 50 60 70 80
-8 -7 -6 -5 -4 -3 -2 -1
Positive index
Negative index

12. Now To access these tuple let us discuss
operations of tuple
Tuple operations
Indexing Slicing Repetition Concatenation Membership
Testing

13. Indexing
Indexing specify the position of elements in a tuple or sequence and
help us to access the value from the sequence separately.
For Example:
if we want to access the number 60 from a tuple given below using
positive index number and 20 using negative number
0 1 2 3 4 5 6 7
10 20 30 40 50 60 70 80
-8 -7 -6 -5 -4 -3 -2 -1
Positive index
Negative index

14. Indexing 0 1 2 3 4 5 6 7
10 20 30 40 50 60 70 80
-8 -7 -6 -5 -4 -3 -2 -1
no=(10,20,30,40,50,60,70,80)
print(no[4])
--------output--------
50
No=(10,20,30,40,50,60,70,80)
print(no[-6])
--------output-------------
30

15. Slicing
Slicing is an operation in which you can slice a particular range
from a sequence.
Syntax: tupname [start : stop : step]
Where, start is the starting point
Stop is the stopping point
Step is the step size—also known as stride, and is
optional. Its default value is 1

16. Slicing Now let Us take one Example:
print ( no [-3 : ] ) 60, 70, 80
print ( no [ 1 : 4 ] ) 20,30,40
Items from 1 to 3
0 1 2 3 4 5 6 7
10 20 30 40 50 60 70 80
-8 -7 -6 -5 -4 -3 -2 -1
no=(10,20,30,40,50,60,70,80)

17. Concatenation
It is a process in which tuple can be combine together with the help
of ‘+’ operator.
Example:
t1=(10,20,30)
t2=(1,2,3)
In this t1 we add t2 and original t1 overwritet1=t1+t2
------------output--------------
(10, 20, 30, 1, 2, 3)
print(t1)

18. Repetition
Multiply ( * asterisk) operator replicates the tuple for specified
number of times.
Example: tup1=(1,2)
print(tup1*3)
------------output--------------
(1, 2, 1, 2,1,2)

19. It check whether a particular element or item is a member of that
sequence or tuple or not.
There are two operator:
1. in operator 2. not in operator
Membership Testing:
in operator:
It returns true if element appears
in the tuple, otherwise returns
false.
Example:
tup1=(10,20,30,40)
print(30 in tup1)
----------output-----------
True

20. Note: it will give True if
value not exists inside
the tuple
not in operator:
It returns true if element not appears in the
tuple, otherwise returns false.
Example:
tup1=(10,20,30,40)
print(50 not in tup1)
----------output-----------
True

21. Tuple functions
len()
count() It count number of times a specified value occurs in a tuple
It returns the length of the tuple means count total number of elements
in a tuple.
tup=(1,2,3,4,5,6,7,8,9)
print(len(tup))
-----Output------
9
tup=(1,2,3,2,4,5,6,2,7,2,8)
print(tup.count(2))
--------OUTPUT-------
4

22. any()
index() Searches the tuple for a specified value and returns the position of
where it was found
It return True, if a tuple is having at least one item.If the tuple is
empty, it will return False.
Tuple functions
tup=(1,2,3,2,4,5,6,2,7,2,8)
print(tup.index(2))
-----Output------
1
tup=(1,2,3)
print(any(tup))
-----Output------
True
tup=()
print(any(tup))
-----Output------
False
If there are
elements
inside it
display
true
If the tuple is empty
it display False

23. min() and max()
sorted() It is used to sort the elements in a tuple.
tup=(-10,25,-5,1,6,19,7)
print(sorted(tup))
-----Output------
(-10, -5, 1, 6, 7, 19, 25)
tup=(10,25,5,1,6,19,7)
print("Max:",max(tup)," Min:",min(tup))
Max: 25 Min: 1

24. Traversing Tuple or how to display the tuple
elements using loops
tup=(1,2,3,4,5,6,7,8,9)
for x in range(0,len(tup)):
print(tup[x])
-----Output------
1
2
3
4
5
6
7
8
9
tup=(1,2,3,4,5,6,7,8,9)
x=0
while x<len(tup):
print(tup[x])
x=x+1