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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_api_urls(self, api_urls=None):
 """ Completes a dict with the CRUD urls of the API. :return: A dict with the CRUD urls of the base API. """

        view_name = self.__class__.__name__
        api_urls = api_urls or {}
        api_urls["read"] = url_for(view_name + ".api_read")
        api_urls["delete"] = url_for(view_name + ".api_delete", pk="")
        api_urls["create"] = url_for(view_name + ".api_create")
        api_urls["update"] = url_for(view_name + ".api_update", pk="")
        return api_urls