OS.STAT().ST_SIZE gives me incorrect size in Python

Question

os.stat doesn’t give me correct output I only get 8192 byte for every file. Code below

import os

path = "C:\"

filelist = os.listdir(path)

for i in filelist:
    if os.path.isdir(os.path.join(path, i)):
        print os.path.join(path, i), "is DIR"
    else:
        # fs = filesize
        fs = os.stat(path).st_size
        # fs = os.path.getsize(path)

        print os.path.join(path, i), "size is", fs

Here is output:

C:$Recycle.Bin is DIR
C:Config.Msi is DIR
C:Documents and Settings is DIR
C:hiberfil.sys size is 8192
C:pagefile.sys size is 8192
C:PerfLogs is DIR
C:Program Files is DIR
C:Program Files (x86) is DIR
C:ProgramData is DIR
C:Python27 is DIR
C:Recovery is DIR
C:shared.log size is 8192
C:System Volume Information is DIR
C:Users is DIR
C:vcredist_x86.log size is 8192
C:Windows is DIR

Why the biggest number is 8192? All files that are not dir have much bigger size than that. Output is the same for os.stat(path).st_size and os.path.getsize(path). Thanks in advance.

Asked By: Hsin

||

Source

Answer 1

You forgot to os.path.join(path, i) when checking the file size with os.stat(), so you always get the size for C: (which is 8192, windows specific stuff). Fixed script:

import os

path = "C:\"

filelist = os.listdir(path)

for i in filelist:
    filepath = os.path.join(path, i)
    if os.path.isdir(filepath):
        print filepath, "is DIR"
    else:
        # fs = filesize
        fs = os.stat(filepath).st_size

        print filepath, "size is", fs

Answered By: Guillaume

Answer 2

This worked for me:

def calc_folder_size(directory):
    # https://www.geeksforgeeks.org/how-to-get-size-of-folder-using-python/
    # assign size
    size = 0
    
    # get size
    for path, dirs, files in os.walk(directory):
        for f in files:
            fp = os.path.join(path, f)
            size += os.path.getsize(fp)

    size = int(size)

    # convert to GB
    if (size / 1e+9) > 0.001:
        size = size / 1e+9
        size = str(size) + " GB"
    else: 
        # convert to MB
        size = size / 1e+6
        size = str(size) + " MB"

    return size

At least most of the time. Sometimes it doesn’t agree with what Windows calculates, but it is pretty close when they are not the same.

Answered By: jangles

OS.STAT().ST_SIZE gives me incorrect size in Python

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