It's been a while since Django replaced os.path to pathlib.Path. More than 3 years to be exact now that I look it up. So I have been kind of using it in my settings.py. But not really. Because once you copy and paste it that's it. You rarely go back to touch those few lines of code in the settings file.

It was one of those things that's put in the back burner and never looked back.

Advent of Code is helping me to learn basic Python skills and syntaxes.

Here are some pathlib examples.

from pathlib import Path

resolve()

# Make the path absolute, resolving any symlinks. A new path object is returned
>>> p = Path(".")
>>> p
PosixPath('.')
>>> p.resolve()
PosixPath('/Users/minhokim/code/adventofcode/2022')
 
>>> pp = p / ".." / ".."
>>> pp.resolve()
PosixPath('/Users/minhokim/code')

as_posix()

# Return a string representation of the path with forward slashes (/)
>>> Path('/Users/minhokim/code').as_posix()
'/Users/minhokim/code'

navigating

>>> r = Path("/")
>>> r2 = r / "etc"
>>> r2
PosixPath('/etc')

exists()

>>> r2.exists()
True
>>> r3 = r2 / "non_existent"
>>> r3
PosixPath('/etc/non_existent')
>>> r3.exists()
False

is_dir()/is_file()

>>> p.is_dir()
True
 
>>> p.is_file()
False

cwd()

>>> cwd = Path.cwd()
>>> cwd
PosixPath('/Users/minhokim/code/adventofcode/2022')
>>> str(cwd)
'/Users/minhokim/code/adventofcode/2022'

parent

>>> cwd.resolve().parent
PosixPath('/Users/minhokim/code/adventofcode')

parents

>>> list(cwd.resolve().parents)
[PosixPath('/Users/minhokim/code/adventofcode'), PosixPath('/Users/minhokim/code'), PosixPath('/Users/minhokim'), PosixPath('/Users'), PosixPath('/')]
 
>>> [*cwd.resolve().parents]
[PosixPath('/Users/minhokim/code/adventofcode'), PosixPath('/Users/minhokim/code'), PosixPath('/Users/minhokim'), PosixPath('/Users'), PosixPath('/')]

iterdir()

>>> list(p.iterdir())
[PosixPath('1.py'), PosixPath('2.py')]
 
>>> [*p.iterdir()]
[PosixPath('1.py'), PosixPath('2.py')]

parts

>>> cwd.parts
('/', 'Users', 'minhokim', 'code', 'adventofcode', '2022')
 
>>> str(cwd).split("/")
['', 'Users', 'minhokim', 'code', 'adventofcode', '2022']

root

>>> cwd.root
'/'

name/suffix/suffixes/stem

>>> Path("/my/blog/post.md").name
'post.md'
 
>>> Path("/my/blog/post.md").suffix
'.md'
 
>>> Path("/my/blog/post.md").suffixes
['.md']
 
>>> Path("/my/blog/post.md").stem
'post'

match(pattern)

>>> Path("/my/blog/post.md").match("*.md")
True

glob(pattern)

>>> sorted(Path(".").glob("*.py"))
[PosixPath('1.py'), PosixPath('2.py')]

# Use of `pathlib` in Django `settings.py`
from pathlib import Path
 
BASE_DIR = Path(__file__).resolve().parent.parent
 
STATICFILES_DIRS = [BASE_DIR / "static"]

__file__ doesn't work in REPL

>>> Path(__file__)
NameError: name '__file__' is not defined.

Python pathlib