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David Gobbi authored
In C++, the vtkTuple class and its subclasses no longer initialize their contents in the default constructor. In order to maintain backwards compatibility within VTK/Python and to make the behavior more pythonic, the wrappers now perform the initialization. The behavior is not completely backwards-compatibile, because the vtkColor4ub class used to initialize to [0,0,0,255] and now it initializes to [0,0,0,0], ditto for vtkColor4v and vtkColor4d. Change-Id: I056992dfb47b8ea1c0927c7ecc621a3e0649932b
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