In this article, we will discuss on Python tuple. The following are the contents of this article:

• Introduction
• Access item
• Negative Indexing
• Range of indexing
• Range of negative indexing
• Tuple length
• Join tuples
• Remove Item
• Loop through tuple
• Checking
• Change Value
• Constructor
• Tuple method

Introduction

To store a collection of items we use tuple in Python. They are immutable because once they are created can’t be altered. They are represented within round brackets “( )”.

Access Tuple Items

By referring the index item within the square brackets we access items of a tuple.

tuple1 = ("mango", "apple", "banana")
print(tuple1[1]) #returns apple

Negative Indexing

Negative indexing refers to the access of items from the end of the tuple.

tuple1 = ("mango", "apple", "banana")
print(tuple1[-1]) #returns banana

Range of Indexes

In Python, we can access a particular number of items present in the tuple by using the range of indexes. The first index and the last index of the range is separated by a colon “: “.

tuple1 = ("mango", "apple", "banana", "guava", "grapes")
print(tuple1[1:4]) #returns ('apple', 'banana', 'guava')

Range of Negative

Specify negative indexes if you want to start the search from the end of the tuple:

tuple1 = ("mango", "apple", "banana", "guava", "grapes", "cucumber", "lichi")
print(tuple1[-4:-1]) #returns ('guava', 'grapes', 'cucumber')

Tuple Length

In order to determine the tuple length, we use the “len()” method.

tuple1 = ("mango", "apple", "banana", "guava", "grapes")
print(len(tuple)) #returns 5

Now there’s a question that can we create a tuple of a single item?

The answer is – Of course!

By using a comma “, “ after the single item we can create a tuple. If we do not use the comma Python will treat it as a string type data. To know more about this you can refer to this site.

tuple1 = ("mango",)
print(type(tuple1)) #returns <class 'tuple'>
tuple1 = ("mango")
print(type(tuple1)) #returns <class 'str'>

Join Two Tuples

By using the ” + ” character we can join two tuples.

tuple1 = ("mango", "apple", "banana", "guava", "grapes")
tuple2 = ("rose", "sunflower", "jui", "jasmine", "tulip")
tuple3= tuple1 + tuple2
print(tuple3)

Remove Items

As tuples are immutable so we can’t remove any item from the tuple but we can delete the entire tuple.

tuple1 = ("mango", "apple", "banana", "guava", "grapes")
del tuple
print(tuple) #this will raise an error because the tuple no longer exists

Loop Through a Tuple

You can use loop through tuple by using for() loop

tuple1 = ("mango", "apple", "banana", "guava", "grapes")
for i in tuple1:
  print(i) 

The following is the output of the above statements.

Check if Item Exists

We use ” in ” if an item is present in a tuple or not.

tuple = ("apple", "banana", "mango")
if "apple" in tuple:
  print("Yes, 'apple' is in the fruits tuple")

Change Tuple Values

We have already know that tuples are immutable. So we can’t change the value directly. What we can do is that we can simply convert the tuple into a list and then only can change the value.

tuple1 = ("apple", "banana", "grapes")
x = list(tuple1)
x[1] = "orange"
tuple1 = tuple(x)
print(x) # returns ['apple', 'orange', 'grapes']

The tuple() Constructor

We use “tuple()” constructor in Python to use tuple

tuple1 = tuple(("apple", "banana", "orange")) # note the double round-brackets
print(tuple1) #returns ('apple', 'banana', 'orange')

Tuple Methods

Python has two built-in methods that you can use on tuples.

• count(): Returns the number of times a specified value occurs in a tuple
• index(): Searches the tuple for a specified value and returns the position of where it was found