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POImportError being generated when trying to run django-celery worker process
 

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  1. POImportError being generated when trying to run django-celery worker process
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    <p>I'm trying to integrate django-celery into an existing site and I'm coming up against an error that I can't seem to get fixed.</p> <p>For context, I went through the <a href="http://docs.celeryproject.org/en/latest/django/first-steps-with-django.html" rel="nofollow">Django first steps</a> and the test project was successful, ie everything worked as it should.</p> <p>Now, in my existing project, I can't get the celery worker running from the command line:</p> <pre><code>manage.py celery worker --loglevel=info --settings=myproject.settings.dev_settings </code></pre> <p>When i run that I get the following stack trace and error:</p> <pre><code>Traceback (most recent call last): File "C:\sites\corecrm\manage.py", line 10, in &lt;module&gt; execute_from_command_line(sys.argv) File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line 453, in execute_from_command_line utility.execute() File "C:\Python27\lib\site-packages\django\core\management\__init__.py", line 392, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "C:\Python27\lib\site-packages\djcelery\management\commands\celery.py", line 22, in run_from_argv ['%s %s' % (argv[0], argv[1])] + argv[2:], File "C:\Python27\lib\site-packages\celery\bin\celery.py", line 901, in execute_from_commandline super(CeleryCommand, self).execute_from_commandline(argv))) File "C:\Python27\lib\site-packages\celery\bin\base.py", line 187, in execute_from_commandline return self.handle_argv(prog_name, argv[1:]) File "C:\Python27\lib\site-packages\celery\bin\celery.py", line 893, in handle_argv return self.execute(command, argv) File "C:\Python27\lib\site-packages\celery\bin\celery.py", line 868, in execute return cls(app=self.app).run_from_argv(self.prog_name, argv) File "C:\Python27\lib\site-packages\celery\bin\celery.py", line 148, in run_from_argv return self(*args, **options) File "C:\Python27\lib\site-packages\celery\bin\celery.py", line 118, in __call__ ret = self.run(*args, **kwargs) File "C:\Python27\lib\site-packages\celery\bin\celery.py", line 220, in run return self.target.run(*args, **kwargs) File "C:\Python27\lib\site-packages\celery\bin\celeryd.py", line 153, in run return self.app.Worker(**kwargs).run() File "C:\Python27\lib\site-packages\celery\apps\worker.py", line 162, in run self.app.loader.init_worker() File "C:\Python27\lib\site-packages\celery\loaders\base.py", line 130, in init_worker self.import_default_modules() File "C:\Python27\lib\site-packages\djcelery\loaders.py", line 138, in import_default_modules self.autodiscover() File "C:\Python27\lib\site-packages\djcelery\loaders.py", line 141, in autodiscover self.task_modules.update(mod.__name__ for mod in autodiscover() or ()) File "C:\Python27\lib\site-packages\djcelery\loaders.py", line 176, in autodiscover for app in settings.INSTALLED_APPS]) File "C:\Python27\lib\site-packages\djcelery\loaders.py", line 195, in find_related_module return importlib.import_module('%s.%s' % (app, related_name)) File "C:\Python27\lib\importlib\__init__.py", line 37, in import_module __import__(name) File "C:\sites\corecrm\people\tasks.py", line 15, in &lt;module&gt; from people.models import Customer, CustomerCsvFile, CustomerToTag, get_customer_from_csv_row File "C:\sites\corecrm\people\models.py", line 163, in &lt;module&gt; UserProfile._meta.get_field_by_name('username')[0]._max_length = 75 File "C:\Python27\lib\site-packages\django\db\models\options.py", line 351, in get_field_by_name cache = self.init_name_map() File "C:\Python27\lib\site-packages\django\db\models\options.py", line 380, in init_name_map for f, model in self.get_all_related_m2m_objects_with_model(): File "C:\Python27\lib\site-packages\django\db\models\options.py", line 469, in get_all_related_m2m_objects_with_model cache = self._fill_related_many_to_many_cache() File "C:\Python27\lib\site-packages\django\db\models\options.py", line 483, in _fill_related_many_to_many_cache for klass in get_models(only_installed=False): File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 197, in get_models self._populate() File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 75, in _populate self.load_app(app_name) File "C:\Python27\lib\site-packages\django\db\models\loading.py", line 96, in load_app models = import_module('.models', app_name) File "C:\Python27\lib\site-packages\django\utils\importlib.py", line 35, in import_module __import__(name) File "C:\sites\corecrm\booking\models.py", line 17, in &lt;module&gt; from people.models import Customer, UserProfile ImportError: cannot import name Customer </code></pre> <p>To try and work out what the booking/models.py script sees in people I added the following at the start:</p> <pre><code>import people print 'path: %s' % people.__path__ for item in dir(people): print item </code></pre> <p>and that gives me the following output:</p> <pre><code>path: ['C:\\sites\\corecrm\\people'] __builtins__ __doc__ __file__ __name__ __package__ __path__ path: ['C:\\sites\\corecrm\\people'] __builtins__ __doc__ __file__ __name__ __package__ __path__ </code></pre> <p>however, when I run <code>manage.py shell --settings=myproject.settings.dev_settings</code> I get the following output:</p> <pre><code>path: ['C:\\sites\\corecrm\\people'] __builtins__ __doc__ __file__ __name__ __package__ __path__ path: ['C:\\sites\\corecrm\\people'] __builtins__ __doc__ __file__ __name__ __package__ __path__ models </code></pre> <p>As you can see the <code>models</code> module is available at the end of the 2nd list for the shell command (and I've confirmed this is also the case for manage.py commands other than celery). How would I make sure that module is available at the same point when I run the celery command?</p> <p>EDIT: I've now also set up this project on an Ubuntu VM and I'm getting the same error when I try to run the worker manage command. Any ideas? Anyone?</p> <p>ANOTHER EDIT: I've pasted the code for booking/models.py and people/models.py at <a href="http://pastebin.com/fTVVBtB4" rel="nofollow">http://pastebin.com/fTVVBtB4</a></p>
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    1. COAren'you missing a "__init__.py" (double underscore before & after init) file in the people/ directory to tell Python it is a package ?
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    2. COIt wouldn't exist at all without the `__init__.py`
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    3. CO@Ricola3D: No, the `__init__.py` file is there, otherwise trying to run the shell management command (or any other command) wouldn't work. Also, the people app was created using `manage.py startapp people`, which automatically puts `__init__.py` in the directory
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