subprocess.Popen.send_signal() should poll the process · Issue #82811 · python/cpython · GitHub
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TestDriven.io on Twitter: "Python tip: Use subprocess module to spawn a new process Use Popen.communicate to capture its result/errors An example👇 https://t.co/Md1E8AItn2" / Twitter
Popen.poll` return annotation should be `Optional[int]` · Issue #3984 · python/typeshed · GitHub
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