Python why use tuple instead of list




















Lists has more builtin function than that of tuple. We can use dir [object] inbuilt function to get all the associated functions for list and tuple. We can clearly see that, there are so many additional functionalities associated with a list over a tuple. We can do insert and pop operation, removing and sorting elements in the list with inbuilt functions which is not available in Tuple. Tuples operation has smaller size than that of list, which makes it a bit faster but not that much to mention about until you have a huge number of elements.

In above code we have tuple a and list b with same items but the size of tuple is less than the list. At first sight, it might seem that lists can always replace tuples. But tuples are extremely useful data structures. Course Index Explore Programiz.

Python if Statement. Python Lists. Dictionaries in Python. Popular Examples Add two numbers. Check prime number. Find the factorial of a number. Print the Fibonacci sequence. Tuples cannot be copied. The reason is that tuples are immutable. For example:. Python allocates memory to tuples in terms of larger blocks with a low overhead because they are immutable. On the other hand, for lists, Pythons allocates small memory blocks.

At the end of it, the tuple will have a smaller memory compared to the list. This makes tuples a bit faster than lists when you have a large number of elements. The above output shows that the list has a larger size than the tuple. The size shown is in terms of bytes. Tuples are used to store heterogeneous elements, which are elements belonging to different data types. Lists, on the other hand, are used to store homogenous elements, which are elements that belong to the same type.

However, note that this is only a semantic difference. You can store elements of the same type in a tuple and elements of different types in a list. The above code will run with no error despite the fact that the list has a mixture of strings and a number.

Tuples have a fixed length while lists have a variable length. A list can be created using a for loop in three simple ways - Create an empty list, Iterate over all the elements that are to be inserted, Append each element in the list using the append function. Using map : The map function in Python can be used alternatively to create a list. This function accepts two parameters - Function: The function to which the map passes each iterable and Iterable: The element or the iterable to be mapped.

Using List comprehensions: This method is the most optimized of all three methods. While in the above methods an empty list has to be created first, list comprehensions allow you to insert all the elements in a list using a single line. Data Science. Data Science All Courses M. Sc in Data Science — University of Arizona. Software Engineering All Courses M. Table of Contents. When is a Python list preferred for storing data? State the various operations of namedtuple.

What are the different ways of creating a list? Leave a comment. Cancel reply Your email address will not be published. Comment Name Email Website. Related Articles. How to Reverse a Number in Python? Python Array vs. Our Trending Data Science Courses. Accelerate Your Career with upGrad.

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