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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 url(route, resource_id=None, pagination=None, **parameters):
 """ Generates an absolute URL to an API resource. :param route: One of the routes available (see the header of this file) :type route: string :param resource_id: The resource ID you want. If None, it will point to the endpoint. :type resource_id: string|None :param pagination: parameters for pagination :type pagination: dict|None :param parameters: additional parameters required by the route :return the absolute route to the API :rtype string """

    route = route.format(**parameters)

    resource_id_url = '/' + str(resource_id) if resource_id else ''

    query_parameters = ''
    if pagination:
        query_parameters += urlencode(pagination)
    if query_parameters:
        query_parameters = '?' + query_parameters

    return _base_url() + route + resource_id_url + query_parameters