When using, first define the Model according to the requirements, and then create a table through create_tables(). If the database table has been created, you can directly create the Model through the python -m pwiz script tool
According to the positioning methods of father and son, brother, and adjacent nodes, many people will encounter the problem that the node they want to locate cannot be directly located in practical applications, and they need to be relatively located through nearby nodes.
WebSocket is a two-way communication protocol based on the TCP protocol that allows real-time data transfer between the browser and the server. In Python, a WebSocket client can be easily implemented using the websocket-client library
Direct assignment: In fact, it is a reference to the object. Shallow copy (copy): copies the parent object and does not copy the internal child objects of the object. Deep copy (deepcopy): The deepcopy method of the copy module completely copies the parent object and its child objects.