How to list files in a folder with size

Question

Hello, I need to list all the files in a folder with several subfolders, I need the name and size of all the files in this folder, I’m trying to make a code in Python for this but I’m not getting, can someone please help?

I started work this week and I’m still learning to use python, so I don’t have the code ready.

Answer 1

As of Python version 3.4, you have no reason to use the package os. A new package has been added, pathlib, to deal with directories and files that abstract much in a more organized way the functions to manage a directory.

If we consider a folder structure:

pasta/
    subpasta/
        subpasta/
            arquivo_4.txt
        arquivo_3.txt

    arquivo_1.txt
    arquivo_2.txt

We can do:

from pathlib import Path

pasta = Path('pasta')

for f in pasta.glob('**/*'):
    if f.is_file():
        print(f.name, f.stat().st_size)

^{See working on Repl.it}

The output would be similar to:

arquivo_2.txt 0
arquivo_1.txt 0
arquivo_3.txt 0
arquivo_4.txt 0

Answer 2

You can generate a dictionary of all files and sizes with the following code:

import os

path = "C:\\seu\\path\\"
lista = [f for f in os.listdir(path)]
tamanhos = []
dict_arquivos = {}

for item in lista:
    dict_arquivos[item] = os.path.getsize(path+item)

print(dict_arquivos)

Answer 3

In a very small way, you can write your code like this:

from os import path, listdir

pasta = '/diretorio'

lista = [dict(arquivo=f, tamanho=path.getsize(path.join(pasta, f))) for f in listdir(pasta)]

The result will be something like:

[
    {'arquivo': 'nota fiscal 08 04 2019.pdf', 'tamanho': 11074}, 
    {'arquivo': 'nota fiscal 08 05 2019.pdf', 'tamanho': 11069}, 
    {'arquivo': 'install.sh', 'tamanho': 1374}, 
    {'arquivo': 'NOTA FISCAL.pdf', 'tamanho': 11028}, 
    {'arquivo': 'test.pdf', 'tamanho': 176427}
]

In the example above, we use a comprehensilist on to generate a list with a dict, containing the values arquivo esize`.

The function path.join is used with the variable pasta because the listdir does not return the full file path, but only its base name inside the folder.

In the tests I did, I used Python version 3.6 and 2.7.

Recursion

If you need to list both directories and subdirectories, I suggest using recursion. I did it this way:

from os import path, walk

pasta = '/home/wallace/Documentos'

def recursive_walk(pasta):

    lista = []

    for raiz, subdirs, arquivos in walk(pasta):
        for f in arquivos:
            arquivo = path.join(raiz, f)
            lista.append(dict(arquivo=arquivo, tamanho=path.getsize(arquivo)))

        for subdir in subdirs:
            lista += recursive_walk(subdir)


    return lista

lista = recursive_walk(pasta)

print(lista)