How Can I Recursively Find Files in Python, Considering Different Python Versions?

Finding Files Recursively Using Python

Recursively finding all files in a directory can be a valuable task for organizing and managing file systems. This article will elaborate on alternative approaches to this task, addressing the limitations of using glob.glob().

Pathlib.Path().rglob()

For Python versions 3.5 and later, the pathlib.Path().rglob() method provides a convenient way to search for files recursively. It allows you to navigate directories and return path objects for files that match a specified pattern.

from pathlib import Path

for path in Path('src').rglob('*.c'):
    print(path.name)

Glob.glob() with recursive Parameter

Alternatively, for earlier versions of Python, glob.glob() offers a recursive parameter that allows for recursive searching. By setting it to True, it will explore subdirectories and return matching files.

from glob import glob

for filename in glob('src/**/*.c', recursive=True):
    print(filename)

Os.walk() and Fnmatch.filter()

For even older Python versions, os.walk() and fnmatch.filter() provide a way to recursively traverse a directory structure and match files using a simple expression.

import fnmatch
import os

matches = []
for root, dirnames, filenames in os.walk('src'):
    for filename in fnmatch.filter(filenames, '*.c'):
        matches.append(os.path.join(root, filename))

This approach offers faster performance compared to pathlib, especially for large file sets.

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