统计分析模块

database.py

@@ -0,0 +1,20 @@
+from sqlalchemy import *
+from sqlalchemy.orm import declarative_base,sessionmaker
+
+db_url = "mysql+pymysql://root:123456@127.0.0.1:3306/student?charset=utf8mb4"  #创建连接对象
+engine = create_engine(db_url)  #与数据库进行连接
+
+Base = declarative_base()     # 执行函数，返回一个基类
+
+
+Session = sessionmaker(bind=engine
+                       ,autoflush=False
+                       ,autocommit = False
+                       )
+
+def get_db():
+    db = Session()
+    try:
+        yield db
+    finally:
+        db.close()