基础框架搭建完成，外键未连接

database.py

@@ -0,0 +1,17 @@
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker,declarative_base
+
+class_management_rul = "mysql+pymysql://root:123456@localhost:3306/ai0824_cyf?charset=utf8mb4"
+
+engine = create_engine(class_management_rul)
+SessionLocal = sessionmaker(bind=engine,autocommit=False, autoflush=False)
+Base = declarative_base()
+
+# 获取数据库会话依赖
+
+def get_db():
+    db = SessionLocal()
+    try :
+        yield db
+    finally:
+        db.close()