test四轮完成的版本，加入老师后，在班级模块能搜到，解除了班级模块的注释，并做了一定改动

main.py

@@ -3,8 +3,7 @@ from fastapi import FastAPI
 # 周学灵、熊浩钦、圣国伟、刘盼的路由
 from api import wl_student_api,wl_class_api,wl_score_api,wl_teacher_api
 from database import Base, engine
-from model import wl_student_model as student_model
-from model import wl_class_model,wl_advisor_model,wl_score_model,wl_teacher_model
+from model import wl_student_model,wl_class_model,wl_advisor_model,wl_score_model,wl_teacher_model
 
 
 Base.metadata.create_all(bind=engine)