How to find size of an object in Python?

Last Updated : 17 Jul, 2023

In python, the usage of sys.getsizeof() can be done to find the storage size of a particular object that occupies some space in the memory. This function returns the size of the object in bytes. It takes at most two arguments i.e Object itself.

Note: Only the memory consumption directly attributed to the object is accounted for, not the memory consumption of objects it refers to.

Examples:

Input: 
# Any Integer Value
sys.getsizeof(4) 
Expected Output: 4 bytes (Size of integer is 4bytes)
Actual Output: 28 bytes

Here's how we can interpret the actual output. Have a look at the table below:

Type of Object	Actual Size	Notes
int	28	NA
str	49	+1 per additional character (49+total length of characters)
tuple	40 (Empty Tuple)	+8 per additional item in a tuple ( 40 + 8*total length of items )
list	56 (Empty List)	+8 per additional item in a list ( 56 + 8*total length of items )
set	216	0-4 take the size of 216. 5-19 take size 728. 20th will take 2264 and so on...
dict	232	0-5 takes a size of 232. 6-10 size will be 360. 11th will take 640 and so on...
func def	136	No attributes and default arguments

Example:

Python3

import sys

# Getting size using getsizeof() method and lately
# printing the same.
a = sys.getsizeof(12)
print(a)

b = sys.getsizeof('geeks')
print(b)

c = sys.getsizeof(('g', 'e', 'e', 'k', 's'))
print(c)

d = sys.getsizeof(['g', 'e', 'e', 'k', 's'])
print(d)

e = sys.getsizeof({1, 2, 3, 4})
print(e)

f = sys.getsizeof({1: 'a', 2: 'b', 3: 'c', 4: 'd'})
print(f)