How to Get the Size of a File in Python

Using os.path.getsize Method

The os.path.getsize() method returns the size, in bytes, of path. Raise OSError if the file does not exist or is inaccessible. For example,

#!/usr/bin/python3

# Import module
import os

size = os.path.getsize("file.txt")
print(size)

10259

Note: the implementation of os.path.getsize is simply return os.stat(filename).st_size.

Using pathlib Module

You can use pathlib.Path().stat() function, it really simple. For example,

#!/usr/bin/python3
# Python 3.4+

# Import module
import pathlib

stat = pathlib.Path("file.txt").stat()
print(stat.st_size)

10259

Using os.stat Method

The os.stat() method gets the status of a file or a file descriptor.

For example,

#!/usr/bin/python3

# Import module
import os

stat = os.stat("file.txt")
print(stat.st_size)

10259