Get actual disk space of a file

Question

How do I get the actual filesize on disk in python? (the actual size it takes on the harddrive).

Answer 1

UNIX only:

import os
from collections import namedtuple

_ntuple_diskusage = namedtuple('usage', 'total used free')

def disk_usage(path):
    """Return disk usage statistics about the given path.

    Returned valus is a named tuple with attributes 'total', 'used' and
    'free', which are the amount of total, used and free space, in bytes.
    """
    st = os.statvfs(path)
    free = st.f_bavail * st.f_frsize
    total = st.f_blocks * st.f_frsize
    used = (st.f_blocks - st.f_bfree) * st.f_frsize
    return _ntuple_diskusage(total, used, free)

Usage:

>>> disk_usage('/')
usage(total=21378641920, used=7650934784, free=12641718272)
>>>

Edit 1 - also for Windows: https://code.activestate.com/recipes/577972-disk-usage/?in=user-4178764

Edit 2 - this is also available in Python 3.3+: https://docs.python.org/3/library/shutil.html#shutil.disk_usage