[Python] Why are interceptors executed in reverse order?

[ben...@google.com]

This is from the comments on the grpc.intercept_channel method: https://github.com/grpc/grpc/blob/f6c090863431b606700440d674eaca5948cffa73/src/python/grpcio/grpc/__init__.py#L1692

And here's the implementation, showing the list on inputs is reversed: https://github.com/grpc/grpc/blob/f6c090863431b606700440d674eaca5948cffa73/src/python/grpcio/grpc/_interceptor.py#L508

Just curious because it isn't very intuitive to me that they are given control in reverse order that they are provided. 

[Lidi Zheng]

The Python interceptor design doc has the description about the execution order ->  https://github.com/grpc/proposal/blob/master/L13-python-interceptors.md#client-side-implementation

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[Ben Karl]

Thank you, Lidi!