Python Tuples

Similar to lists, tuples are also used to store multiple object in a variable. But the tuples are fixed which cannot change once its created - IMMUTABLE data type. It can store any type (int, float, string etc..) of data and they can be accessed using both positive and negative indexes as similar to list data

Tuple Creation

Tuple created by declare all the items inside the round brackets ()

#Tuple Creation
languages = ("Python", "Java", "Javascript")
print(type(languages))

#Multiple data types can store in list
user_details = (1, "PYTHON", "99.0", ["Jan", "Feb"])
print(user_details)

#In case of single item, comma is mandatory
without_comma_item = ("Jan")
with_comma_item = ("Jan",)
print(type(without_comma_item), type(with_comma_item))

Output

<class 'tuple'>
(1, 'PYTHON', '99.0', ['Jan', 'Feb'])
<class 'str'> <class 'tuple'>

Tuple Reading

As similar to list, tuple data items can be read with both positive ann negative index

"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"
0	1	2	3	4	5
-6	-5	-4	-3	-2	-1

Every item in the list have both positive and negative index like the above table

#Tuple Reading
month_list = ("Jan", "Feb", "Mar", "Apr", "May", "Jun")

#Reading the first item of the tuple
print(month_list[0])
print(month_list[-6])

#Reading the second item of the tuple
print(month_list[1])
print(month_list[-5])

#Reading the last item of the tuple
print(month_list[5])
print(month_list[-1])

Output

Jan
Jan
Feb
Feb
Jun
Jun

Tuple Update

Tuple are immutable data types in python, so we cannot perform the update operation

#Tuple Update
month_list = ("Jan", "Dec", "Mar", "Apr", "May", "Jun")

#Update using index of the item raise exception
month_list[1] = "Feb"

Output

Traceback (most recent call last):
File "<string>", line 5, in <module>
TypeError: 'tuple' object does not support item assignment

Needs to recreate the entire object due to its immutability

#Tuple Update
month_list = ("Jan", "Dec", "Mar", "Apr", "May", "Jun")
print(id(month_list))

#Recreating the entire object
month_list = ("Jan", "Feb", "Mar", "Apr", "May", "Jun")
print(id(month_list))
print(month_list)

Output

140186154916736
140186155260128
('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun')

Tuple Deletion

Tuple are immutable data types in python, so we cannot perform the specific deletion which we can do in a list

#Tuple Deletion
month_list = ("Jan", "Dec", "Feb", "Mar", "Apr", "May", "Jun")

#Specific element deletion raises exception
month_list.remove("Dec")

Output

Traceback (most recent call last):
File "<string>", line 5, in <module>
AttributeError: 'tuple' object has no attribute 'remove'

Entire object requires to delete in Tuple in case of new modification

#Tuple Deletion
month_list = ("Jan", "Dec", "Feb", "Mar", "Apr", "May", "Jun")

#Deletion the entire item
del month_list
print(month_list)

Output

Traceback (most recent call last):
File "<string>", line 6, in <module>
NameError: name 'month_list' is not defined

Tuple Slicing

Tuple slicing helps to return the required objects from the given tuple

TupleName(start Index: stop Index: step Value (optional)]

• start Index Not declare means, first value index consider by python

• stop Index Not declare means, last value index consider by python

Read a object with the help of positive and negative index value

"Jan"	"Feb"	"Mar"	"Apr"	"May"	"Jun"
0	1	2	3	4	5
-6	-5	-4	-3	-2	-1

#Tuple Slicing
month_list = ("Jan", "Feb", "Mar", "Apr", "May", "Jun")

#Print the first two items
print(month_list[0:2])
print(month_list[-6:2])
print(month_list[:2])

#Print the middle two items
print(month_list[2:4])
print(month_list[-4:4])

#Print the last two items
print(month_list[4:6])
print(month_list[-2:6])
print(month_list[4:])

Output

('Jan', 'Feb')
('Jan', 'Feb')
('Jan', 'Feb')
('Mar', 'Apr')
('Mar', 'Apr')
('May', 'Jun')
('May', 'Jun')
('May', 'Jun')