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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 includeme(config):
 """ Include `crabpy_pyramid` in this `Pyramid` application. :param pyramid.config.Configurator config: A Pyramid configurator. """


    settings = _parse_settings(config.registry.settings)
    base_settings = _get_proxy_settings(settings)

    # http caching tween
    if not settings.get('etag_tween_disabled', False):
        config.add_tween('crabpy_pyramid.conditional_http_tween_factory')

    # create cache
    root = settings.get('cache.file.root', '/tmp/dogpile_data')
    if not os.path.exists(root):
        os.makedirs(root)

    capakey_settings = dict(_filter_settings(settings, 'capakey.'),
                            **base_settings)
    if 'include' in capakey_settings:
        log.info("The 'capakey.include' setting is deprecated. Capakey will "
                 "always be included.")
    log.info('Adding CAPAKEY Gateway.')
    config.add_renderer('capakey_listjson', capakey_json_list_renderer)
    config.add_renderer('capakey_itemjson', capakey_json_item_renderer)
    _build_capakey(config.registry, capakey_settings)
    config.add_request_method(get_capakey, 'capakey_gateway')
    config.add_directive('get_capakey', get_capakey)
    config.include('crabpy_pyramid.routes.capakey')
    config.scan('crabpy_pyramid.views.capakey')

    crab_settings = dict(_filter_settings(settings, 'crab.'), **base_settings)
    if crab_settings['include']:
        log.info('Adding CRAB Gateway.')
        del crab_settings['include']
        config.add_renderer('crab_listjson', crab_json_list_renderer)
        config.add_renderer('crab_itemjson', crab_json_item_renderer)
        _build_crab(config.registry, crab_settings)
        config.add_directive('get_crab', get_crab)
        config.add_request_method(get_crab, 'crab_gateway')
        config.include('crabpy_pyramid.routes.crab')
        config.scan('crabpy_pyramid.views.crab')