Tuples in Python

1) What is Tuple?

• Just like List, Tuple is a collection of ordered elements. But the difference between list and Tuple is, tuples are immutable i.e. the elements in the Tuple cannot be changed, once it is assigned.

• Tuples also can store both homogeneous and heterogeneous elements.

2) Creating a Tuple

• Tuples can be created by placing all the elements separated by commas inside parentheses().
• Parentheses are optional but it is good practice to use them.

     Ex: tup = ( 2, 4, "three")

2.1) Tuple Packing

• Tuples can also be created without parentheses. This is called Tuple packing.

     Ex:  tup = 2, 4, "three"

  2.2) Creating a Tuple with a single element

• To create a Tuple with a single element, we have to include a comma at the end of the element (trailing comma) even though it has only one value.

     Ex: tup = (2,)

3) Accessing Tuple elements

3.1) Indexing

• Since Tuples are ordered, we can access the Tuple elements by referring to the index position of the element, inside square brackets.

• We can also access the Tuple element from the end using a negative index.

• In general, negative index means starting from the end, -1 refers to last, -2 refers to second last, and so on.

• Ex:

Tuple Index Access

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3.2) Slicing

• We can access a range of elements in a Tuple by specifying a range of index [start: end] 

• The return value of slicing will be a new Tuple with specified elements.

• We can also specify the negative index if we want to slice the element from the last of the Tuple.

• Ex:

Tuple index slicing

Output

4) Iterating Tuple elements

• We can iterate through the Tuple elements by using a for loop.

• Ex:

Iterating Tuple elements

Output

• By using the 'in' keyword, we can check whether the element is present in the Tuple or not.

• Ex:

Searching element in Tuple

Output

5) Changing Tuples

• Tuples are immutable, unlike List. This means we cannot update or add Tuple elements.

• Let's see an example and check whether it throws an error or not.

• Ex:

Changing elements in Tuple

Output

6) Deleting Tuple - del

• Since Tuples are immutable, we cannot remove elements from them. But we can delete the entire Tuple using the del keyword.

• Ex:

Deleting Tuple

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7) Concatenation/Joining and nesting of two tuples

Concatenation and nesting in Tuple

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8) Tuple Methods

• Python offers two built-in methods that can be used on tuples.

• count() - returns the number of times the specified value present in the tuple.

• index() - returns the index position of the specified value where it was found first. If not found, it will throw an error.

Tuple built-in function

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