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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 present(name, auth=None, **kwargs):
    '''
    Ensure a security group rule exists

    defaults: port_range_min=None, port_range_max=None, protocol=None,
              remote_ip_prefix=None, remote_group_id=None, direction='ingress',
              ethertype='IPv4', project_id=None

    name
        Name of the security group to associate with this rule

    project_name
        Name of the project associated with the security group

    protocol
        The protocol that is matched by the security group rule.
        Valid values are None, tcp, udp, and icmp.

    '''
    ret = {'name': name,
           'changes': {},
           'result': True,
           'comment': ''}

    kwargs = __utils__['args.clean_kwargs'](**kwargs)

    __salt__['neutronng.setup_clouds'](auth)

    if 'project_name' in kwargs:
        kwargs['project_id'] = kwargs['project_name']
        del kwargs['project_name']

    project = __salt__['keystoneng.project_get'](
        name=kwargs['project_id'])

    if project is None:
        ret['result'] = False
        ret['comment'] = "Project does not exist"
        return ret

    secgroup = __salt__['neutronng.security_group_get'](
        name=name,
        filters={'tenant_id': project.id}
    )

    if secgroup is None:
        ret['result'] = False
        ret['changes'] = {},
        ret['comment'] = 'Security Group does not exist {}'.format(name)
        return ret

    # we have to search through all secgroup rules for a possible match
    rule_exists = None
    for rule in secgroup['security_group_rules']:
        if _rule_compare(rule, kwargs) is True:
            rule_exists = True

    if rule_exists is None:
        if __opts__['test'] is True:
            ret['result'] = None
            ret['changes'] = kwargs
            ret['comment'] = 'Security Group rule will be created.'
            return ret

        # The variable differences are a little clumsy right now
        kwargs['secgroup_name_or_id'] = secgroup

        new_rule = __salt__['neutronng.security_group_rule_create'](**kwargs)
        ret['changes'] = new_rule
        ret['comment'] = 'Created security group rule'
        return ret

    return ret