which.py

which.py

def which(cmd):
    """Path to executable `cmd`.

    Args:
        cmd (str or list): Name of the executable or list of alternative names.

    Returns:
        pathlib.Path: Path to executable (the first recoverable path for a list).

    """

    try:
        from shutil import which as which  # python3 only
    except ImportError:
        from distutils.spawn import find_executable as which

    if isinstance(cmd, str):
        path = which(cmd)
    else:
        for c in cmd:
            path = which(c)
            if path is not None:
                break
    path = Path(path) if path else None
    return path