class Urls:
    BASE_URL = "https://www.zhixue.com"
    GET_TOPICS_URL = f"{BASE_URL}/paperfresh/api/xgk/getTopics"
    GET_TEXTBOOK_URL = f"{BASE_URL}/paperfresh/api/common/getBookTree"
    GET_KNOWLEDGES_URL = f"{BASE_URL}/paperfresh/api/xgk/getKnowledgeTree"

    SWITCH_SUBJECT_URL = f"{BASE_URL}/paperfresh/api/common/switchSubject"