-Tuples in Python-

Tuple

A tuple is a collection of objects, ordered and immutable.

EX:

What all details are required to create an address?

● House Number

● Apartment /Area

● Street Name

● Place

● Pin code

● District

So for storing an address, will it be easy if we have to create separate variables for each of these parameters?

Tuples help us in such cases.

address= “12/1 “, “Rose Garden”, “The Mall”, “Rauria”,” Jorhat”

Here the parameters separated by commas (,) are considered as a tuple and assigned to a variable.

Why ordered?

It is indexed and can be iterated sequentially (same as the list).

Immutable

Tuples once created, cannot be changed.

eg: address= “12/1 “, “Rose Garden”, “The Mall”, “Rauria”,” Jorhat”

address=( “12/1 “, “Rose Garden”, “The Mall”, “Rauria”,” Jorhat”)

Here, both are tuples. () are optional in creating a tuple. Objects separated by commas form a tuple.

Note: Tuples are sequences, just like lists. indexing, slicing, and functions are common for lists and tuples. The only difference is that mutable functions like insert, remove, etc cannot be used with tuple.

Also, the replacement of objects is not allowed in tuples.

A tuple once created, cannot be modified.

Packing/Unpacking of tuple

address=( “12/1 “, “Rose Garden”, “The Mall”, “Lauria”,” Jorhat”)

Here, several elements are referred to together with a single name. t This is known as packing. houseNo,apartment,street,location,district=address

Here each element of the tuple- ‘address’, will be assigned to each variable on left. This is known as unpacking.

Now, houseNo has a value of “12/1” apartment has a value of “Rose Garden” etc.

The same technique can be used in multiple variable assignments also. eg: x,y,z=1,2,3 ( x will be assigned 1, y 2 and z 3)

Create a tuple that stores the address of a student, unpack it into separate variables, and print it.

Create a tuple that stores the phone number of a student. (only one element)

If the comma is not there, it will be treated as a string. The below program illustrates it.

Output

Note: type() returns the datatype of a variable.

From the address tuple created above, print only the house no. (concept : indexing)

Print each element of the above address in separate lines. (concept :iteration)

Create a tuple containing 10 marks of a student.

From the above tuple,

● Find if the student has scored 100% in a subject (use ‘in’)

● Print no of subjects in which student has scored 90 (use count() )

● Marks of first 5 subjects (concept: slicing)

● Marks of last 3 subjects (concept: slicing)

Calculate the average marks and print it.

Comments

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