Traceback (most recent call last):

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/plugins/multiprocess.py", line 788, in run
self.setUp()

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py", line 291, in setUp
self.setupContext(ancestor)

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/plugins/multiprocess.py", line 770, in setupContext
super(NoSharedFixtureContextSuite, self).setupContext(context)

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/suite.py", line 314, in setupContext
try_run(context, names)

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/nose/util.py", line 470, in try_run
return func()

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/testing/decorators.py", line 139, in setup_class
cls._func()

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/tests/test_axes.py", line 1988, in test_hist_stacked_bar
ax.hist(d, bins=10, histtype='barstacked', align='mid', color=colors, label=labels)

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/matplotlib/axes/_axes.py", line 5479, in hist
flat = np.ravel(x)

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/fromnumeric.py", line 1097, in ravel
return asarray(a).ravel(order)

 "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/numpy/core/numeric.py", line 284, in asarray
return array(a, dtype, copy=False, order=order)ValueError: setting an array element with a sequence.
Traceback (most recent call last):


 "/usr/local/bin/celery", line 11, in <module>

sys.exit(main())


 "/usr/local/lib/python3.6/site-packages/celery/__main__.py", line 14, in main

_main()


 "/usr/local/lib/python3.6/site-packages/celery/bin/celery.py", line 326, in main

cmd.execute_from_commandline(argv)


 "/usr/local/lib/python3.6/site-packages/celery/bin/celery.py", line 488, in execute_from_commandline

super(CeleryCommand, self).execute_from_commandline(argv)))


 "/usr/local/lib/python3.6/site-packages/celery/bin/base.py", line 281, in execute_from_commandline

return self.handle_argv(self.prog_name, argv[1:])


 "/usr/local/lib/python3.6/site-packages/celery/bin/celery.py", line 480, in handle_argv

return self.execute(command, argv)


 "/usr/local/lib/python3.6/site-packages/celery/bin/celery.py", line 412, in execute

).run_from_argv(self.prog_name, argv[1:], command=argv[0])


 "/usr/local/lib/python3.6/site-packages/celery/bin/worker.py", line 221, in run_from_argv

return self(*args, **options)


 "/usr/local/lib/python3.6/site-packages/celery/bin/base.py", line 244, in __call__

ret = self.run(*args, **kwargs)


 "/usr/local/lib/python3.6/site-packages/celery/bin/worker.py", line 255, in run

**kwargs)


 "/usr/local/lib/python3.6/site-packages/celery/worker/worker.py", line 99, in __init__

self.setup_instance(**self.prepare_args(**kwargs))


 "/usr/local/lib/python3.6/site-packages/celery/worker/worker.py", line 122, in setup_instance

self.should_use_eventloop() if use_eventloop is None


 "/usr/local/lib/python3.6/site-packages/celery/worker/worker.py", line 241, in should_use_eventloop

self._conninfo.transport.implements.async and


 "/usr/local/lib/python3.6/site-packages/kombu/transport/base.py", line 125, in __getattr__

raise AttributeError(key)
AttributeError: async
