Python – wsgi and python print statements

mod-wsgipythonwsgi

I have become aware that the print statements in my django app are causing wsgi to error and fail. Without going over all my code and removing/commenting out the print statements, is there a way I can disable them when running wsgi. It needs to be a simple as possible.

Thanks

Best Answer

Use WSGIRestrictStdout option:

WSGIRestrictStdout Off

or replace sys.stdout with sys.stderr in Django WSGI star script:

import sys
sys.stdout = sys.stderr

Writing To Standard Output

No WSGI application component which claims to be portable should write to standard output. That is, an application should not use the Python print statement without directing output to some alternate stream. An application should also not write directly to sys.stdout.

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Ok, so once again we come down to user error. At some point the problem changed because I changed some of the code above, so that

def post_authentication_api(request):

became

def post_authentication_api(self, request):

this doesnt work because as Graham said at the django mailing list

"If you ... have a 'self' first argument for a function which isn't a method of a class, it is obvious you are going to get:"

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So after I fixed that up I came to the root of the problem (as far as I can tell) which was that wsgi was blocking sys.stdout. which I think seems fair to me, and I had some print statements in my code and this is why it wasnt running. A very simple problem that for some reason became very complicated.

Anyway, Great thanks to Graham who has helped me out for the last week on this. He has been tireless and very accommodating to someone who is quite embarrassed about the final outcome. Some votes will be coming his way for the comments and my many thanks as well.

Thanks again

Mark

Best Answer

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