[Fix] sys.stderr.fileno() throws an AttributeError exception

[Evilran]

When I tried to delivered the playwright tasks via celery==4.4.7, I got an AttributeError exception at line 50 in main.py.

except AttributeError:

I've checked the source from pytest, the original code is:

    except (AttributeError, io.UnsupportedOperation):
           # pytest-xdist monkeypatches sys.stderr with an object that is not an actual file.
           # https://docs.python.org/3/library/faulthandler.html#issue-with-file-descriptors
           # This is potentially dangerous, but the best we can do.
           return sys.__stderr__.fileno()

It perfectly works if I changed it to the original code, so I think we should be consistent with the original source code to enhance compatibility.

I also checked the celery official docs. The reason why I got an AttributeError exception probably is that the log proxy of celery is not support the stderr attribute.

[mxschmitt]

@Evilran did you try it locally after adding AttributeError to your local playwright/main.py and did it work?

Sounds good to me that we can add it.

[Evilran]

@mxschmitt I did that before and it works as expected! I think it would be nice if you could change it in the next stable version of playwright-python package 👍

[mxschmitt]

@mxschmitt I did that before and it works as expected! I think it would be nice if you could change it in the next stable version of playwright-python package 👍

Cool thanks for confirming, will adjust it.

[mxschmitt]

@Evilran released version 0.151.1 https://pypi.org/project/playwright/0.151.1/

[Evilran]

@Evilran released version 0.151.1 https://pypi.org/project/playwright/0.151.1/

Awesome work, cool!

[yswtrue]

it seems not to work in 0.171.0 and celery 4.47