Python client interceptor with retry

[Kristof]

Hi 👋 

As far as I can tell the python client implementation doesn't yet support retries (is there a timeline).

Despite this, GitHub issues and documentation suggest that a retry mechanism is possible to implement in a python client with an interceptor.

As this seems like a generic problem that is applicable to all kinds of gRPC clients, somebody must have already implemented it open source.

Do you guys know of code examples on how to implement retry in a python interceptor?

Thanks

K

[Richard Belleville]

Kristof,

I don't currently have a timeline for in-library support for retries, but implementing it using interceptors isn't too difficult. Here's an example of an interceptor a member of the community shared a while ago.

Thanks,

Richard

[James Wu]

When I tried to adapt example interceptor as a stream-stream interceptor, it didn't quite work.

response = continuation(client_call_details, request)

isinstance(response, grpc.RpcError) # Returns True as expected

response.code() # Blocks

Is this expected? Is there a way to implement a retry interceptor for a unary-stream and stream-stream RPC?