Make filters available in Orange.data namespace.

Author: thocevar

Orange/data/__init__.py

@@ -7,3 +7,4 @@
 from .storage import *
 from .table import *
 from .io import *
+from .filter import *

Orange/data/filter.py

@@ -12,6 +12,11 @@
 from Orange.util import Enum
 
 
+__all__ = ["IsDefined", "HasClass", "Random", "SameValue", "Values",
+           "FilterDiscrete", "FilterContinuous", "FilterString",
+           "FilterStringList", "FilterRegex"]
+
+
 class Filter(Reprable):
     """
     The base class for filters.