修复了sqlalchemy 在运行Fastapi后端服务一段时间后数据库连接超时的问题

[296711867]

1、修改启动参数
把uvicorn.run("main:app", reload=False, port=5000)中的main修改为了__main__

2、修改对数据库连接的代码
打包后，sqlalchemy 在运行Fastapi后端服务一段时间后数据库连接超时的问题
修改为：

# 不使用连接池
engine = create_engine(db_uri, pool_pre_ping=True, pool_recycle=-1)
# 设置sqlalchemy 回收链接的时间为10分钟 
# engine = create_engine(db_uri, pool_recycle=600)
# 在每次使用连接前都会进行ping操作，并且连接的最大空闲时间为30分钟（1800秒）后才会被回收
# engine = create_engine(db_uri, pool_pre_ping=True,pool_recycle=1800)

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[zy7y]

1、修改启动参数 把uvicorn.run("main:app", reload=False, port=5000)中的main修改为了__main__

2、修改对数据库连接的代码 打包后，sqlalchemy 在运行Fastapi后端服务一段时间后数据库连接超时的问题 修改为：

# 不使用连接池
engine = create_engine(db_uri, pool_pre_ping=True, pool_recycle=-1)
# 设置sqlalchemy 回收链接的时间为10分钟 
# engine = create_engine(db_uri, pool_recycle=600)
# 在每次使用连接前都会进行ping操作，并且连接的最大空闲时间为30分钟（1800秒）后才会被回收
# engine = create_engine(db_uri, pool_pre_ping=True,pool_recycle=1800)

这两步看下来是非必须的，说的打包是打成桌面端？暂不合入