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How to Find Files by Extension in Python

This code walks a directory tree with pathlib, collects all file paths, and counts them by extension to summarize a project's contents.

pathlib file-system recursion

Python

from pathlib import Path

def get_project_files(base_path="."):
    """Return a sorted list of all file paths under base_path."""
    base = Path(base_path)
    files = [p for p in base.rglob("*") if p.is_file()]
    return sorted(files)

def count_by_extension(files):
    """Return a dict mapping extension (lowercase…

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