Could you provide a minimal example that would allow us to reproduce the
issue? With core, the following works for me (I don't have compat
installed):
import sys, StringIO
oldstderr = sys.stderr
oldstdout = sys.stdout
sys.stderr = sys.stdout = StringIO.StringIO()
sys.stderr.fileno = lambda: 10
import pywikibot
oldstdout.write("Before output\n")
pywikibot.output('test')
oldstdout.write("After output; this is in our buffer:\n")
sys.stderr.seek(0)
oldstdout.write(repr(sys.stderr.read()))
$ PYWIKIBOT2_DIR=. python test.py
Before output
After output; this is in our buffer:
'WARNING: Running on Windows and transliteration_target is not set.\nPlease
see
https://www.mediawiki.org/wiki/Special:MyLanguage/Manual:Pywikibot/Windows\ntest
\n'
Nonetheless, I would suggest to use normal shell redirection techniques,
instead of monkey-patching python's sys module. If you want to use python,
the following should work (untested):
import subprocess
stdout, stderr = subprocess.Popen(["c:\python27\python", "pwb.py"],
stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
# do something with stdout and stderr
I *think* it should also be possible to do this with the logging module,
but I'm not sure how to do that in a quick-and-easy way.
Merlijn
On 24 June 2014 09:52, Jonathan Goble <[email protected]> wrote:
> When the error began occurring, I was using the Pywikibot nightly dump
> from February 25 of this year. It continues to occur with the nightly dump
> from yesterday (June 23). I just tried the fileno = lambda: 10 trick and it
> had no effect.
>
> As for core, it's been four months since I last tried it so I don't recall
> the issues. It's past bedtime for me right now, but I'll look into giving
> it another try within the next day or two when I have some time.
>
>
> On Tue, Jun 24, 2014 at 3:17 AM, Merlijn van Deen <[email protected]>
> wrote:
>
>> On 24 June 2014 06:17, Jonathan Goble <[email protected]> wrote:
>>
>> I've given up trying to solve a bug that popped up in my scripts a couple
>>> days ago. I run a bot for Wookieepedia, over at Wikia, and run three simple
>>> scripts on a daily basis. They are set up to run automatically through
>>> Windows Task Scheduler. Since they run automatically, they run in the
>>> background through pythonw.exe, i.e. without a console, and therefore I
>>> need a means of getting the output. My solution for the past two months has
>>> been to redirect sys.stdout and sys.stderr to the same StringIO() instance,
>>> then at the end call getvalue() on that and email it to myself.
>>>
>>
>> Could it be you haven't updated in a few years? It sounds like it's
>> related to a feature that I added two or three years ago, that allowed
>> Windows users to get full unicode out- and input. However, that does mean
>> sys.stdin and sys.stdout are no longer being used. We /do/ check whether
>> the user has redirected the output using normal shell redirection, but your
>> method doesn't do that.
>>
>> There are a two options I can think of.
>> - use normal shell redirection, e.g.
>> https://stackoverflow.com/questions/8662024/how-do-i-capture-the-output-of-a-script-if-it-is-being-ran-by-the-task-scheduler
>>
>> - trick the code into thinking you're doing 'regular' redirection by
>> adding a fileno function to your streams:
>> see
>> https://github.com/wikimedia/pywikibot-compat/blob/master/userinterfaces/win32_unicode.py#L92
>>
>> you'd need something like x = StringIO.StringIO(); x.fileno = lambda:
>> 10
>> and the same for stdout.
>>
>> (By the way, the answer is NOT "switch to core". I have tried to get
>>> core to run on my system and failed miserably after two hours of repeated
>>> attempts without even getting it to talk to the wiki. Compat worked
>>> perfectly on the first try. Until such time as core can be installed by a
>>> beginner, it is not for me.)
>>>
>>
>> I would appreciate it if you could clarify what the issues were you ran
>> into.
>>
>> Merlijn
>>
>>
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>>
>>
>
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