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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_audits():
 """Get OS hardening apt audits. :returns: dictionary of audits """

    audits = [AptConfig([{'key': 'APT::Get::AllowUnauthenticated',
                          'expected': 'false'}])]

    settings = get_settings('os')
    clean_packages = settings['security']['packages_clean']
    if clean_packages:
        security_packages = settings['security']['packages_list']
        if security_packages:
            audits.append(RestrictedPackages(security_packages))

    return audits