Resources

Basics

Import

from pathlib import Path

List subdirectories

p = Path('.')
dir_paths = [x for x in p.iterdir() if x.is_dir()]

Glob

list(p.glob('**/*.py'))

p = Path('/etc')
q = p / 'init.d' / 'reboot'
# => PosixPath('/etc/init.d/reboot')
q.resolve()
# => PosixPath('/etc/rc.d/init.d/halt')

Querying path properties:

q.exists()

q.is_dir()

Opening a file

with q.open() as f_in:
    text = f_in.readline()

Real projects

Absolute path to app directory

If it dangerous to just use Path('.') as that is the current working directory, not the directory of the script.

The approach is useful when running the script from anywhere in or outside the repo and keeping paths relative to that app directory i.e. the top-level module inside the repo.

my_repo/
    my_app/
        my_app.py
        constants.py

After research, I found this to be effective. It resolves relative and symlinks (I think?) and the directory will get parent directory.

APP_DIR = Path(__file__).resolve().parent

This should be set in the config or constants module, so it can be imported by other scripts.

from constants import APP_DIR

Path to var directory

For writing CSV or log files, for example.

VAR_DIR = APP_DIR / "var"
APP_LOG_PATH = VAR_DIR / "app.log"