Import error for Orange : Forums : PythonAnywhere

Import error for Orange

Hi! I`m trying to add a little bit of machine learning to my app and working with Orange to do this. I have app on Flask, Python 2.7 and try to import Orange 2.7.8 (which is preinstalled on pythonanywhere), but get an error after

import Orange

2015-03-18 09:41:33,559 :Traceback (most recent call last):
2015-03-18 09:41:33,559 :  File "/bin/user_wsgi_wrapper.py", line 130, in __call__
2015-03-18 09:41:33,560 :    self.error_log_file.logger.exception("Error running WSGI application")
2015-03-18 09:41:33,560 :  File "/usr/lib/python2.7/logging/__init__.py", line 1185, in exception
2015-03-18 09:41:33,560 :    self.error(msg, *args, **kwargs)
2015-03-18 09:41:33,560 :  File "/usr/lib/python2.7/logging/__init__.py", line 1178, in error
2015-03-18 09:41:33,560 :    self._log(ERROR, msg, args, **kwargs)
2015-03-18 09:41:33,560 :  File "/usr/lib/python2.7/logging/__init__.py", line 1270, in _log
2015-03-18 09:41:33,561 :    record = self.makeRecord(self.name, level, fn, lno, msg, args, exc_info, func, extra)
2015-03-18 09:41:33,561 :  File "/usr/lib/python2.7/logging/__init__.py", line 1244, in makeRecord
2015-03-18 09:41:33,561 :    rv = LogRecord(name, level, fn, lno, msg, args, exc_info, func)
2015-03-18 09:41:33,561 :  File "/usr/lib/python2.7/logging/__init__.py", line 284, in __init__
2015-03-18 09:41:33,561 :    self.threadName = threading.current_thread().name
2015-03-18 09:41:33,561 :  File "/usr/lib/python2.7/threading.py", line 1160, in currentThread
2015-03-18 09:41:33,562 :    return _active[_get_ident()]
2015-03-18 09:41:33,562 :  File "/bin/user_wsgi_wrapper.py", line 122, in __call__
2015-03-18 09:41:33,562 :    app_iterator = self.app(environ, start_response)
2015-03-18 09:41:33,562 :  File "/bin/user_wsgi_wrapper.py", line 136, in import_error_application
2015-03-18 09:41:33,562 :    raise e
2015-03-18 09:41:33,562 :ValueError: Attempted relative import in non-package

Has no problem with Orange on my local machine and no problem with importing another libs. Could someone throw some light on this situation?

corplings | 5 posts | March 18, 2015, 10:10 a.m. | permalink

Hi there,

Are you sure this error is related to importing Orange? (eg: what happens if you take out the import Orange line- do you still get the same error?)

conrad | 4232 posts | PythonAnywhere staff | March 18, 2015, 12:21 p.m. | permalink

Yes, if i take out this import line - everything works fine.

corplings | 5 posts | March 18, 2015, 12:26 p.m. | permalink

If I do "import Orange" from a Python console, it works fine

rcs1000 | 311 posts | March 18, 2015, 12:29 p.m. | permalink

And when I put it in a script it seems to work too.

rcs1000 | 311 posts | March 18, 2015, 12:31 p.m. | permalink

Hmm. I just did a quick check by setting up a new standard flask app, and importing Orange, and I also do not get this error.

As an experiment, what error do you get if you run python /var/www/corplings_pythonanywhere_com_wsgi.py directly?

conrad | 4232 posts | PythonAnywhere staff | March 18, 2015, 12:41 p.m. | permalink

I get this:

Traceback (most recent call last):
  File "/var/www/corplings_pythonanywhere_com_wsgi.py", line 18, in <module>
    from main import app as application
  File "/home/corplings/mysite/main.py", line 9, in <module>
    app.config.from_object('config')
  File "/usr/local/lib/python2.7/dist-packages/flask/config.py", line 162, in from_object
    obj = import_string(obj)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/utils.py", line 411, in import_string
    return __import__(import_name)
  File "/usr/local/lib/python2.7/dist-packages/Orange/OrangeCanvas/config.py", line 20, in <module>
    from .utils.settings import Settings, config_slot
ValueError: Attempted relative import in non-package

corplings | 5 posts | March 18, 2015, 12:49 p.m. | permalink

ah ok. I think this is because there is a config.py in Orange, and a config.py in flask, and they are conflicting with each other. This conflict is not apparent across different machines (eg: if your local machine has its PATH set so that it looks at the config.py from flask first instead of from Orange first)

I would try doing your Orange import later, or in a separate file. (eg: import data_mining_code, and within data_mining_code.py you import Orange)

conrad | 4232 posts | PythonAnywhere staff | March 18, 2015, 6:38 p.m. | permalink

Thanks a lot! It works now, after I imported Orange later as you said.

corplings | 5 posts | March 19, 2015, 10:05 a.m. | permalink