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it only takes a minute: Sign up Python subprocess IOError: [Errno 4] up vote 0 down vote favorite I'm implementing python program which returns a result of subprocess(like 'ls'). The subprocess has a feature like subscribing continuous output, more specific, it subscribes two results, and there is short term(about 1sec) between two results. So, I've designed a class like below python catch interrupted system call for subscribing that output. class Subscribe: def __init__(self, sec): self.m_sec = sec def subscribeResult(self, p): self.m_timeout = False signal.signal(signal.SIGALRM, self.handleTimeout) signal.alarm(self.m_sec) returnValue = "" try: with p.stdout: for line in iter(p.stdout.readline, b''): if self.m_timeout: signal.alarm(0) p.kill() return "timeout" returnValue += line p.stdout.close() p.wait() exception Exception, inst: print inst signal.alarm(0) p.kill() return "except" signal.alarm(0) rv = returnValue.strip() if rv == "": return "null" return rv def handleTimeout(self, signum, frame): self.m_timeout = True It's working well, but very rarely raised IO exception like below. : IOError: [Errno 4] Interrupted system call Is there weak point in code? Please, let me know how to erase exception python subprocess ioerror share|improve this question asked May 11 '15 at 5:28 user1844328 233 2 You need to post the whole traceback message so that we can see where this exception comes from. –Stephen Lin May 11 '15 at 7:15 add a comment| 1 Answer 1 active oldest votes up vote 0 down vote In most cases, just retry whatever system calls you were performing e.g., subprocess module has a helper function to ign
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View https://www.codecademy.com/en/forum_questions/50b37ce05a9a33b3030023af Course 333 points Submitted by Jelly Bean almost 4 years ago File "python", line 4, in