Exception for deep list filter

[Kudo]

Given

collection_filter({'aList': [{'anotherList': [{'foo': 1, 'bar': 2}]}]}, 'aList[].anotherList[].foo')

Will throw exception:

---------------------------------------------------------------------------
AssertionError                            Traceback (most recent call last)
<ipython-input-11-0e52659d65b7> in <module>()
----> 1 collection_filter({'aList': [{'anotherList': [{'foo': 1, 'bar': 2}]}]}, 'aList[].anotherList[].foo')

/Users/kudo/.virtualenvs/biienv/lib/python2.7/site-packages/collection_filter-0.5-py2.7.egg/collection_filter/collection_filter.pyc in collection_filter(data, fields)
    111         # [2] For each dot notated sub field, do further query recursively
    112         next_field, remain_query = _get_next_field(field)
--> 113         subset = _inner_filter(copy.deepcopy(data), next_field, remain_query)
    114         if data_as_list:
    115             # [3-1] For list, set each element as merged dictionary

/Users/kudo/.virtualenvs/biienv/lib/python2.7/site-packages/collection_filter-0.5-py2.7.egg/collection_filter/collection_filter.pyc in _inner_filter(data, field, remain_query, expect_list)
     80                                    next_field,
     81                                    remain_query,
---> 82                                    expect_list=expect_list)
     83
     84         # Return {field: result} if there are existed next query

/Users/kudo/.virtualenvs/biienv/lib/python2.7/site-packages/collection_filter-0.5-py2.7.egg/collection_filter/collection_filter.pyc in _inner_filter(data, field, remain_query, expect_list)
     51                                       field,
     52                                       remain_query,
---> 53                                       expect_list=False)
     54         return data
     55     else:

/Users/kudo/.virtualenvs/biienv/lib/python2.7/site-packages/collection_filter-0.5-py2.7.egg/collection_filter/collection_filter.pyc in _inner_filter(data, field, remain_query, expect_list)
     80                                    next_field,
     81                                    remain_query,
---> 82                                    expect_list=expect_list)
     83
     84         # Return {field: result} if there are existed next query

/Users/kudo/.virtualenvs/biienv/lib/python2.7/site-packages/collection_filter-0.5-py2.7.egg/collection_filter/collection_filter.pyc in _inner_filter(data, field, remain_query, expect_list)
     55     else:
     56         # `data` is dict
---> 57         assert type(data) == dict
     58         if not field:
     59             # If current field query is empty, try to fetch next query

AssertionError: