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this would have been nice to have more than once in my personal projects, and in build/infra tooling for Chromium OS. our alternatives so far have been the obvious ones: use subprocess.run to capture & return the output, then manually feed that as the input to the next command, and so on. we know it has obvious overhead so we've avoided with large output.
we strongly discourage/ban attempts to write shell code, so the vast majority of our commands are argv style (list of strings), so the pipes module wouldn't help us.
handling of SIGPIPE tends to be where things get tricky. that'll have to be handled by the API explicitly i think.