The example given in data_saver.py doesn't compile.

[basnijholt]

(original issue on GitLab)

opened by Piotr (@Benedysiuk) at 2018-09-04T18:55:17.775Z

Data_saver.py is broken.
There is a missing import and even with it one gets Attribute Error when trying to run it.
Full trace back:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-24-9aee42ca60f3> in <module>()
      1 _learner = adaptive.Learner1D(simulate, bounds=(-0.001, 0.001))
----> 2 learner = adaptive.DataSaver(_learner, arg_picker=operator.itemgetter('particles'))

/opt/conda/lib/python3.6/site-packages/adaptive/learner/data_saver.py in __init__(self, learner, arg_picker)
     34 
     35         # Methods that the BaseLearner implements
---> 36         self.add_data = self.learner.add_data
     37         self.__getstate__ = self.learner.__getstate__
     38         self.__setstate__ = self.learner.__setstate__

AttributeError: 'Learner1D' object has no attribute 'add_data'

[basnijholt]

originally posted by Bas Nijholt (@basnijholt) at 2018-09-05T08:21:35.397Z on GitLab

From your traceback I can see that you are using the old version of adaptive, please update.

Also, the import is not needed inside the file because operator is never used.