Create method for tallying items in QuestionList results

[rbyh]

The results tally() method is not working - here for checkbox results:

[rbyh]

Modify to work for lists of lists

[rbyh]

Still getting this error after other PR merged

[rbyh]

tally() should allow user to select results based on tally count eg exclude results where tally < 10

[johnjosephhorton]

@rbyh: Can you create a simple, ok-to-share results object on coop + post URL here that has a tally fail? It will help me write agains that.

[rbyh]

Results UUID: '43140db3-17d5-4aae-b702-8a6a9c880c83'

from edsl.questions import QuestionList
from edsl import Agent, Scenario

things = ["birds", "flowers", "toys"]

agents = [Agent(traits = {"favorite_thing":t}) for t in things]

q = QuestionList(
    question_name = "example_tally_list_error",
    question_text = "Name 3 {{ thing }} that are blue."
)

s = [Scenario({"thing":t}) for t in things]

results = q.by(s).by(agents).run()

results.tally("example_tally_list_error")

Error:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[6], line 1
----> 1 results.tally("example_tally_list_error")

File [~/edsl/edsl/results/ResultsExportMixin.py:33](http://localhost:8888/lab/tree/~/edsl/edsl/results/ResultsExportMixin.py#line=32), in ResultsExportMixin._convert_decorator.<locals>.wrapper(self, *args, **kwargs)
     31 """Return the function with the Results object converted to a Dataset object."""
     32 if self.__class__.__name__ == "Results":
---> 33     return func(self.select(), *args, **kwargs)
     34 elif self.__class__.__name__ == "Dataset":
     35     return func(self, *args, **kwargs)

File [~/edsl/edsl/results/ResultsExportMixin.py:515](http://localhost:8888/lab/tree/~/edsl/edsl/results/ResultsExportMixin.py#line=514), in ResultsExportMixin.tally(self, top_n, format, *fields)
    512     if isinstance(value, list):
    513         value = tuple(value)
--> 515 tally = dict(Counter(values))
    516 sorted_tally = dict(sorted(tally.items(), key=lambda item: -item[1]))
    517 if top_n is not None:

File [~/.pyenv/versions/3.11.7/lib/python3.11/collections/__init__.py:599](http://localhost:8888/lab/tree/~/.pyenv/versions/3.11.7/lib/python3.11/collections/__init__.py#line=598), in Counter.__init__(self, iterable, **kwds)
    588 '''Create a new, empty Counter object.  And if given, count elements
    589 from an input iterable.  Or, initialize the count from another mapping
    590 of elements to their counts.
   (...)
    596 
    597 '''
    598 super().__init__()
--> 599 self.update(iterable, **kwds)

File [~/.pyenv/versions/3.11.7/lib/python3.11/collections/__init__.py:690](http://localhost:8888/lab/tree/~/.pyenv/versions/3.11.7/lib/python3.11/collections/__init__.py#line=689), in Counter.update(self, iterable, **kwds)
    688             super().update(iterable)
    689     else:
--> 690         _count_elements(self, iterable)
    691 if kwds:
    692     self.update(kwds)

TypeError: unhashable type: 'list'