Mount ISO Loop Device Mock Script in Python

import os
import tempfile
from dataclasses import dataclass
from pathlib import Path

@dataclass
class LoopDevice:
    path: str
    iso_path: str
    mounted: bool = False

    def mount(self, mount_point: str):
        if self.mounted:
            raise RuntimeError(f"Loop device {self.path} already mounted")
        os.makedirs(mount_point, exist_ok=True)
        self.mounted = True
        self.mount_point = mount_point
        print(f"MOUNT: {self.iso_path} -> {mount_point} via {self.path}")

    def unmount(self):
        if not self.mounted:
            raise RuntimeError(f"Loop device {self.path} not mounted")
        self.mounted = False
        print(f"UNMOUNT: {self.iso_path} released from {self.path}")

def mount_iso(iso_path: str, mount_point: str) -> LoopDevice:
    if not Path(iso_path).exists():
        raise FileNotFoundError(f"ISO file not found: {iso_path}")
    device = LoopDevice(path="/dev/loop0", iso_path=iso_path)
    device.mount(mount_point)
    return device

if __name__ == "__main__":
    with tempfile.TemporaryDirectory() as tmpdir:
        iso = Path(tmpdir) / "test.iso"
        iso.touch()  # simulate existing ISO file
        mount_dir = Path(tmpdir) / "mnt"

        dev = mount_iso(str(iso), str(mount_dir))
        print(f"Device: {dev.path}, Mounted: {dev.mounted}")
        print(f"ISO content visible at: {mount_dir}")

        dev.unmount()
        print(f"Device: {dev.path}, Mounted: {dev.mounted}")