# Tuple Vs Lists Size Difference

Hello Everyone,

Good Morning.

I have been Recently working on Memory efficiency of different data structures used in Python Language so I am presenting my thoughts on same with mostly widely used sequences Lists and Tuples.

This has been asked to me in lot of Interviews I am just adding one of base reason why would you prefer Tuple over lists.

**The main reason is Tuple occupies less memory size as compared to List.**


> 
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.


```
For example:
tuple_names = ('Nicholas', 'Michelle', 'Alex')
list_names = ['Nicholas', 'Michelle', 'Alex']
print(tuple_names.__sizeof__())
print(list_names.__sizeof__())

``` 


```
Output:
48
64
``` 


Let me know your thoughts on same and what other reasons you prefer tuple over list, let me know in comment section below.

Thanks. Happy Sunday

**PS: Tuple is Immutable means you cannot change it's value post creation other than creating new object in memory.
**
#datascience #dataengineering #list #tuple #pythonprogrammer #python3