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Sergii Tkachenko de6ed9ba9f [Python] Migrate from yapf to black (#33138 An error occurred ) - Switched from yapf to black - Reconfigure isort for black - Resolve black/pylint idiosyncrasies Note: I used `--experimental-string-processing` because black was producing "implicit string concatenation", similar to what described here: https://github.com/psf/black/issues/1837. While currently this feature is experimental, it will be enabled by default: https://github.com/psf/black/issues/2188. After running black with the new string processing so that the generated code merges these `"hello" " world"` strings concatenations, then I removed `--experimental-string-processing` for stability, and regenerated the code again. To the reviewer: don't even try to open "Files Changed" tab 😄 It's better to review commit-by-commit, and ignore `run black and isort`.		2 years ago
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README.md	Add retry example for gRPC Python (#26829 An error occurred )	4 years ago
async_retry_client.py	[Python] Migrate from yapf to black (#33138 An error occurred )	2 years ago
flaky_server.py	[Python] Migrate from yapf to black (#33138 An error occurred )	2 years ago
helloworld.proto	Add retry example for gRPC Python (#26829 An error occurred )	4 years ago
retry_client.py	[Python] Migrate from yapf to black (#33138 An error occurred )	2 years ago

README.md

Retry Example in gRPC Python

Prerequisite

grpcio >= 1.39.0
grpcio-tools >= 1.39.0

Running the example

In terminal 1, start the flaky server:

python3 flaky_server.py

In terminal 2, start the retry clients:

python3 retry_client.py
# Or
python3 async_retry_client.py

Expect results

The client RPC will succeed, even with server injecting multiple errors. Here is an example server log:

$ python3 flaky_server.py
INFO:root:Starting flaky server on [::]:50051
INFO:root:Injecting error to RPC from ipv6:[::1]:54471
INFO:root:Successfully responding to RPC from ipv6:[::1]:54473
INFO:root:Injecting error to RPC from ipv6:[::1]:54491
INFO:root:Injecting error to RPC from ipv6:[::1]:54581
INFO:root:Injecting error to RPC from ipv6:[::1]:54581
INFO:root:Injecting error to RPC from ipv6:[::1]:54581
INFO:root:Injecting error to RPC from ipv6:[::1]:54581
INFO:root:Successfully responding to RPC from ipv6:[::1]:54581
INFO:root:Injecting error to RPC from ipv6:[::1]:55474
INFO:root:Injecting error to RPC from ipv6:[::1]:55474
INFO:root:Injecting error to RPC from ipv6:[::1]:55474
INFO:root:Injecting error to RPC from ipv6:[::1]:55474
INFO:root:Successfully responding to RPC from ipv6:[::1]:55474
INFO:root:Injecting error to RPC from ipv6:[::1]:55533
INFO:root:Injecting error to RPC from ipv6:[::1]:55533
INFO:root:Injecting error to RPC from ipv6:[::1]:55533
INFO:root:Successfully responding to RPC from ipv6:[::1]:55533