Errors at Python program exit: "close failed in file object destructor"; "sys.excepthook is missing"

Question

After the last line (print statement) in my python code, I get the following error:

close failed in file object destructor:
sys.excepthook is missing
lost sys.stderr

Anyone know where this might be coming from?

Update: My python code is extremely long but I will post portions that may have something to do with this error:

For one, near the beginning of the process I redirect stdout and stderr to a log file like this:

so = se = open(logfile, 'w', 0)                       
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0) 
os.dup2(so.fileno(), sys.stdout.fileno())           
os.dup2(se.fileno(), sys.stderr.fileno())

I do this all the time though and have never run into this error but it seems the most likely reason I'm seeing this.

Overstock

What do you do with the error (stderr) stream when you call the program? – Lomax

Are you importing any modules you wrote yourself named sys? – Stope

I think the error might be coming from your code, but since you haven't shown us any of it, the world may never know. – Suffragan

@Suffragan hah well, the code is super long and i don't know which parts are relevant to this error so that's why i didn't post anything – Overstock

@WillemVanOnsem please see the edit to my post – Overstock

Validate that the portion you post is actually sufficient to reproduce the problem. See stackoverflow.com/help/mcve for the rules on creating a Minimal, Complete, Verifiable Example. Yes, this means you need to do some work yourself before asking your question. – Thurstan

Answer 1

Adding the following statement to the very end of my main function fixes this issue for me:

try:
    sys.stdout.close()
except:
    pass
try:
    sys.stderr.close()
except:
    pass

Overstock

Answer 2

Doing flush and close worked for me.

sys.stdout.flush()
sys.stdout.close()

sys.stderr.flush()
sys.stderr.close()

Northumbria

The answer by user20408 works for me. This answer works too and sheds light with a new error message: sys.stdout.flush() IOError: [Errno 32] Broken pipe – Maillot