Python subprocess and stderr

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Suppose you want to create a pipeline with the subprocess and you want to capture the stderr. A colleague of mine upstream wrote this : p1 = subprocess.Popen(cmd1, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True) p2 = subprocess.Popen(cmd2, stdin=p1.stdout, stdout=subprocess.PIPE, stderr=subprocess.PIPE, close_fds=True) p1.stdout.close() p1_stderr = p1.communicate() p2_stderr =…

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