hi, When I browse subprocess document on (https://docs.python.org/3.11/library/subprocess.html) I find some piece about "Replacing os.popen(), os.popen2(), os.popen3()", but I can't find any popen3() in module os, untill I search the document to version 2.7. Maybe the content related to the deprecated document should be cleaned in the latest version. Best Regards, SUN Guonian