About python backend usage

[bot66]

Did I miss something? I do not see any use cases similar to above descriptions.

This turtorials just define the backend field to "python" in the config.pbtxt. And place a model.py file under the {version} directory. In this case it's not a custom backend? the model.py is not a custom backend?

What is a custom backend? When to use it?

model_repository/
├── pipeline
│   ├── 1
│   │   ├── model.py
│   │   └── __pycache__
│   │       └── model.cpython-38.pyc
│   └── config.pbtxt
├── text_encoder
│   ├── 1
│   │   └── model.onnx
│   └── config.pbtxt
└── vae
    ├── 1
    │   └── model.plan
    └── config.pbtxt