Error Outputting System Checks in django/core/management/base.py

[David Muller]

I'm trying to install celery==3.1.17 with django 1.8b2 (following the ​celery + django install instructions).

I get the following TypeError when I try to launch a celery worker AND have unresolved system warnings:

Trying to launch celery worker...

celery -A my_project worker -l info

yields ...

  File "/usr/local/etc/virtualenvs/gears/local/lib/python2.7/site-packages/celery/fixups/django.py", line 162, in validate_models
    cmd.check()
  File "/usr/local/etc/virtualenvs/gears/local/lib/python2.7/site-packages/django/core/management/base.py", line 530, in check
    self.stderr.write(msg, lambda x: x)
TypeError: function takes exactly 1 argument (2 given)

It appears that Django is throwing a TypeError at ​this line in django/core/management/base.py

The problem "goes away" if I silence Django's system checks.

[Baptiste Mispelon]

Hi,

This seems more like a bug on celery's side, caused by this line: ​https://github.com/celery/celery/blob/master/celery/fixups/django.py#L161

Management's commands self.stderr and self.stdout should be instances of OutWrapper whose write() method support more than one argument (in this instance, a style_func argument used for formatting).

I'm going to mark this as invalid. Feel free to reopen if you think there's really something we should fix on Django's end.

Thanks.

[David Muller]

Ah, thanks for the details, that makes a lot of sense. I'll open up a ticket with the Celery folks.

(​https://github.com/celery/celery/issues/2536)

Thanks again!