Find whether you can write to a path without actually doing so (in python)

is_writable.py

import os
from pathlib import Path

def is_writable(path: Path) -> tuple[bool,str]:
    """Determines if path is writeable without actually writing to it.
    Return True if the process can write to path, and False otherwise, along with a useful error message."""
    if path.exists():
        if not os.access(path, os.W_OK):
            return False, f"Cannot write to {path}: permission denied"
    else:
        parent = path.parent
        if not parent.is_dir():
            return False, f"Cannot write to {path}: directory {parent} does not exist"
        if not os.access(parent, os.W_OK):
            return False, f"Cannot write to {path}: permission denied writing to {parent}"
    return True, f"{path} is writable"