temporary fix for array_annotation checks

Author: sprenger

neo/io/proxyobjects.py

@@ -34,8 +34,9 @@ def __init__(self, array_annotations=None, **annotations):
             annotations['file_origin'] = str(self._rawio.source_name())
 
         # clean annotations that are not 1D
-        # TODO change array_annotations handling to avoid that
-        array_annotations = {k: v for k, v in array_annotations.items() if v.ndim==1}
+        # TODO remove this once multi-dimensional array_annotations are possible
+        array_annotations = {k: v for k, v in array_annotations.items()
+                             if (not hasattr(v, 'ndim') or v.ndim == 1)}
 
         # this mock the array annotaions to avoid inherits DataObject
         self.array_annotations = ArrayDict(self.shape[-1])