def norm_package_version(version):
    """Normalize a version by removing extra spaces and parentheses."""
    if version:
        version = ','.join(v.strip() for v in version.split(',')).strip()

        if version.startswith('(') and version.endswith(')'):
            version = version[1:-1]

        version = ''.join(v for v in version if v.strip())
    else:
        version = ''

    return version