Fixed flakes

holoviews/core/data/__init__.py

@@ -61,7 +61,7 @@
 
 from ..dimension import Dimension, process_dimensions
 from ..element import Element
-from ..ndmapping import OrderedDict, NdMapping
+from ..ndmapping import OrderedDict
 from ..spaces import HoloMap, DynamicMap
 from .. import util
 

holoviews/core/data/array.py

@@ -1,4 +1,3 @@
-from collections import defaultdict
 try:
     import itertools.izip as zip
 except ImportError:

holoviews/core/data/dask.py

@@ -242,7 +242,6 @@ def concat(cls, datasets, dimensions, vdims):
             for d, k in zip(dimensions, key):
                 data[d.name] = k
             dataframes.append(data)
-        template = datasets[0][1]
         return dd.concat(dataframes)
 
     @classmethod

holoviews/core/data/grid.py

@@ -117,6 +117,7 @@ def init(cls, eltype, data, kdims, vdims):
                             'actual shape: %s' % (vdim, valid_shape, shape), cls)
         return data, {'kdims':kdims, 'vdims':vdims}, {}
 
+
     @classmethod
     def concat(cls, datasets, dimensions, vdims):
         from . import Dataset

holoviews/core/data/interface.py

@@ -113,7 +113,6 @@ def cast(cls, datasets, datatype=None, cast_type=None):
         with the given cast_type (if specified).
         """
         datatype = datatype or cls.datatype
-        interfaces = list(util.unique_iterator((d.interface for d in datasets)))
         cast = []
         for ds in datasets:
             if cast_type is not None or ds.interface.datatype != datatype:
@@ -296,7 +295,7 @@ def concatenate(cls, datasets, datatype=None):
         """
         Utility function to concatenate an NdMapping of Dataset objects.
         """
-        from . import Dataset
+        from . import Dataset, default_datatype
         if isinstance(datasets, NdMapping):
             dimensions = datasets.kdims
             datasets = datasets.data

holoviews/core/ndmapping.py

@@ -13,7 +13,7 @@
 from . import util
 from .dimension import OrderedDict, Dimension, Dimensioned, ViewableElement
 from .util import (unique_iterator, sanitize_identifier, dimension_sort,
-                   basestring, wrap_tuple, process_ellipses, get_ndmapping_label, pd)
+                   basestring, wrap_tuple, process_ellipses, get_ndmapping_label)
 
 
 class item_check(object):
@@ -429,9 +429,11 @@ def info(self):
 
     def table(self, datatype=None, **kwargs):
         "Creates a table from the stored keys and data."
-        new_data = [(key, value.table(datatype=datatype, **kwargs)) for key, value in self.data.items()]
-        tables = self.clone(tables, shared_data=False)
-        return value.interface.concatenate(tables)
+        from .data.interface import Interface
+        new_data = [(key, value.table(datatype=datatype, **kwargs))
+                    for key, value in self.data.items()]
+        tables = self.clone(new_data)
+        return Interface.concatenate(tables)
 
 
     def dframe(self):