带有 pathlib 的路径部分列表中的路径

Question

I want to generate a path based on a list inside the configuration toml. I have chosen a list to be able to support different operating systems.

For example the following list is stored inside my configuration.toml:

temporary_storage_folder = ["~", "temp", "machine_name"]

This should then be converted into a Path object.

The trivial constructor seems not to exists, so:

from pathlib import Path
Path(["~", "temp", "mesomics"])

does not work.

I came up with the following solution

from pathlib import Path
config_list = ["~", "temp", "machine_name"] # is actually parsed from the toml
path_list = [Path(x) for x in config_list]
path_obj = Path(*path_list)

but I'm not sure if this is best practice or the pythonic way of achieving my goal. I'm also open to suggestions on how to otherwise save a general path in a config.

Answer 1

You can just do:

from pathlib import Path
config_list = ["~", "temp", "machine_name"] 
storage_obj = Path(*config_list)

Which generates:

PosixPath('~/temp/machine_name')

In terms of specific usage for config files, I would use Pydantic with a Path field:

from pydantic import BaseSettings
import pathlib

class SetupConfig(BaseSettings):
    path_obj: pathlib.Path

Then you can add your own validators to ensure the path is valid (such as, if it actually exists and the path is a directory and the directory has the correct stuff within it)