开始学习sqlalchemy1.4

sqlalchemy_1.4/db_schema.py

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+import sqlalchemy
+from sqlalchemy.orm import declarative_base, sessionmaker, Session  # declarative 声明式
+from sqlalchemy import create_engine, Column, Integer, String
+
+# 创建数据引擎
+HOST = "home.rogersun.cn"
+USER = "root"
+PWD = "Sxzgx1209"
+PORT = "3306"
+DB = "orm_sqlalchemy"
+
+URI = f"mysql+pymysql://{USER}:{PWD}@{HOST}:{PORT}/{DB}"
+engine = create_engine(URI, echo=True)
+
+# 创建session
+session = sessionmaker(engine)
+
+# with session
+# with Session(engine) as db_session:
+#     session.begin()
+#     try:
+#         db_session.add("some_object")
+#         db_session.add("some_other_object")
+#     except:
+#         db_session.rollback()
+#         raise
+#     else:
+#         db_session.commit()
+
+# 生成orm基类
+Base = declarative_base()
+
+
+class User(Base):
+    __tablename__ = 'user'