def ver_cmp(ver1, ver2):
    """
    Compare lago versions

    Args:
        ver1(str): version string
        ver2(str): version string

    Returns:
        Return negative if ver1<ver2, zero if ver1==ver2, positive if
        ver1>ver2.
    """

    return cmp(
        pkg_resources.parse_version(ver1), pkg_resources.parse_version(ver2)
    )