How Can I List Files in a Directory Using Python?

Listing Files in a Directory in Python

Python provides several methods for traversing directories and retrieving a list of files. Here are three common approaches:

Using os.listdir() and os.path.isfile()

import os
from os.path import isfile, join

mypath = "/path/to/directory"

# Get a list of all files in the directory
onlyfiles = [f for f in os.listdir(mypath) if isfile(join(mypath, f))]

This method retrieves all files and directories in the specified directory. To filter out only files, isfile() is used to check if each item in the list is a file.

Using os.walk()

import os

f = []

for (dirpath, dirnames, filenames) in os.walk(mypath):
    f.extend(filenames)
    break

os.walk() recursively yields directories and files within the specified path. If only the current directory's files are needed, the iteration can be broken after the first yield.

Using next(os.walk())

import os

filenames = next(os.walk(mypath), (None, None, []))[2]

A shorter variation of using os.walk() is to use next(). It returns three lists: the current directory path, a list of subdirectories, and a list of files. The [2] index retrieves only the list of files.

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