Why are there separate tuple and list data types in Python?

Provide separate tuple and list data types because the two have different roles. Tuples are immutable, while lists are mutable. This means that lists can be modified, but tuples cannot.

Tuples are sequences, just like lists. The difference between tuples and lists is that unlike lists, tuples cannot be changed and tuples use brackets while lists use square brackets.

Let's see how to create lists and tuples.

Create a basic tuple

Example

Let's first create a basic tuple containing integer elements and then move on to tuples within tuples

# Creating a Tuple
mytuple = (20, 40, 60, 80, 100)

# Displaying the Tuple
print("Tuple = ",mytuple)

# Length of the Tuple
print("Tuple Length= ",len(mytuple))

Output

Tuple =  (20, 40, 60, 80, 100)
Tuple Length=  5

Create a Python list

Example

We will create a list of 10 integer elements and display it. Elements are enclosed in square brackets. This way we also show the length of the list and how to access specific elements using square brackets -

# Create a list with integer elements
mylist = [25, 40, 55, 60, 75, 90, 105, 130, 155, 180];

# Display the list
print("List = ",mylist)

# Display the length of the list
print("Length of the List = ",len(mylist))

# Fetch 1st element
print("1st element = ",mylist[0])

# Fetch last element
print("Last element = ",mylist[-1])

Output

List =  [25, 40, 55, 60, 75, 90, 105, 130, 155, 180]
Length of the List =  10
1st element =  25
Last element =  180

Can we update the tuple value?

Example

As mentioned above, tuples are immutable and cannot be updated. However, we can convert the Tuple to a List and then update it.

Let’s see an example -

myTuple = ("John", "Tom", "Chris")
print("Initial Tuple = ",myTuple)

# Convert the tuple to list
myList = list(myTuple)

# Changing the 1st index value from Tom to Tim
myList[1] = "Tim"
print("Updated List = ",myList)

# Convert the list back to tuple
myTuple = tuple(myList)
print("Tuple (after update) = ",myTuple)

Output

Initial Tuple =  ('John', 'Tom', 'Chris')
Updated List =  ['John', 'Tim', 'Chris']
Tuple (after update) =  ('John', 'Tim', 'Chris')

The above is the detailed content of Why are there separate tuple and list data types in Python?. For more information, please follow other related articles on the PHP Chinese website!