Giampaolo Rodola' <g.rod...@gmail.com> added the comment: -1 about the PR solution to suppress ProcessLookupError in case the process is gone. In psutil I solved the “pid reused problem” by using process creation time to identify a process uniquely (on start). A decorator can be used to protect the sensibile methods interacting with the PID/handle (communicate(), send_signal(), terminate(), kill()) and raise an exception (maybe ProcessLooKupError(“PID has been reused”)?).
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