Tuples

Tuple is a data structure in Python. It is another sequence data type that is similar to the list. A tuple consists of a number of values separated by commas. Tuples are enclosed within parentheses ( ).

Syntax

                Variable= (tuple1,tuple2,tuple3………)

Example:

                Subject=(“English”, “Physics”, “Maths”, “Chemistry”,“IP”)

Remember  : Tuples are immutable, but member objects may be mutable.

Examples :

>>> Marks=(43,56,87,34) >>> Marks (43, 56, 87, 34) >>> address=(32,"Ratan","kanpur",208022) #Heterogeneous tuple >>> address (32, 'Ratan', 'kanpur', 208022) >>> per=43,76,89,43      #parenthesis are not must >>> per (43, 76, 89, 43) >>> digits=(1,2,3,4,5,) >>> digits (1, 2, 3, 4, 5) >>> nestTuple=(32,45,67),(11,22,33)       #nested tuple- tuples inside a tuple >>> nestTuple ((32, 45, 67), (11, 22, 33)) >>> tupList=((1,3,6,7),['Welcome','Tuple']) # tuple and list inside a tuple- a nested tuple >>> tupList ((1, 3, 6, 7), ['Welcome', 'Tuple']) >>> year=([1999,2000,2001],[2017,2018,2020]) >>> year ([1999, 2000, 2001], [2017, 2018, 2020])

 

Example 1: Creating empty tuple :

>>> Tup=tuple()

>>> print(Tup)

()

OR

>>> d=()

>>> d

()

Example 2: to create tuple containing string values using function tuple().

>>> Languages=(‘C’, ‘C++’, ‘Java’, ‘Python’)

>>> print(Languages)  

(‘C’, ‘C++’, ‘Java’, ‘Python’)

>>> type(Languages)

<class 'tuple'>

Example : Creating tuple by accepting user input using while or for loop

Using while loop Marks=tuple() N=int(input("How many marks to be entered ->")) I=1 while(I<=N):     A=input("enter marks :")     Marks=Marks+(A,)     I=I+1 print("Output ") print(Marks) output How many marks to be entered ->5 enter marks :87 enter marks :54 enter marks :32 enter marks :98 enter marks :43 Output ('87', '54', '32', '98', '43')

Using for loop Marks=tuple() N=int(input("How many marks to be entered ->")) for I in range(N):     A=input("enter marks :")     Marks=Marks+(A,)     I=I+1 print("Output ") print(Marks) Output : How many marks to be entered ->5 enter marks :98 enter marks :32 enter marks :65 enter marks :87 enter marks :43 Output ('98', '32', '65', '87', '43')

 Question 1: Write a Python program to store ‘n’ mobile accessories in a tuple.

Accessories =tuple() N=int(input("How many accessories to be entered -> ")) for I in range(N):     print("Enter accessories ",I+1," : ", end="")     A=input()     Accessories =Accessories+(A,) print("Output -> ") print(Accessories) Output : How many accessories to be entered -> 5 Enter accessories 1 : Headphone Enter accessories 2 : Battery Enter accessories 3 : Cover Enter accessories 4 : Charger Enter accessories 5 : SD Card Output -> ('Headphone', 'Battery', 'Cover', 'Charger', 'SD Card')

 

Accessing a Tuple

Elements of a tuple can be accessed using an indexing method.

Traversing a tuple

 

1.       Using in operator using for loop teacher=('Pramod','Ankita','Vanshika','Amit') for i in teacher:     print(i) Output: Pramod Ankita Vanshika Amit 2.       Using range() function teacher=('Pramod','Ankita','Vanshika','Amit') n=len(teacher) for i in range(n):     print(teacher[i]) # Like lists, tuples also can be created using range() function.     Output: Pramod Ankita Vanshika Amit

 Difference Between List and Tuple in Python

Sr. No.	Key	List	Tuple
1	Type	List is mutable.	Tuple is immutable.
2	Iteration	List iteration is slower and is time consuming.	Tuple iteration is faster.
3	Appropriate for	List is useful for insertion and deletion operations.	Tuple is useful for read only operations like accessing elements.
4	Memory Consumption	List consumes more memory.	Tuples consumes less memory.
5	Methods	List provides many in-built methods.	Tuples have less in-built methods.
6	Error prone	List operations are more error prone.	Tuples operations are safe.
7.	Example	aList=[43,54,43,32,34]	aTuple=(43,54,73,56)