Get system root directory (application installed root directory)

    Returns
    -------
    string
        A full path

def get_system_root_directory():
    """
    Get system root directory (application installed root directory)

    Returns
    -------
    string
        A full path

    """
    root = os.path.dirname(__file__)
    root = os.path.dirname(root)
    root = os.path.abspath(root)
    return root