写好了增加学生接口，增加学生dao层，main里加入了student——router

database.py

@@ -0,0 +1,13 @@
+from models import *
+from core.database import *
+from sqlalchemy import create_engine
+
+
+db_url = "mysql+pymysql://root:123456@127.0.0.1:3306/student_manager?charset=utf8mb4"
+engine = create_engine(db_url
+                       ,pool_size=50
+                       ,echo=True)
+
+Base.metadata.create_all(engine)
+db = SessionLocal()
+db.commit()