import sys
from pathlib import Path

from .error import InterpreterError

def load_file_path(arg: str) -> Path:
    """load given argument."""

    try:
        index = int(arg.split(':')[1])
    except ValueError:
        raise InterpreterError('Invalid argument index')
    except IndexError:
        return Path(arg).resolve()

    return Path(sys.argv[2 + index])