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diff --git a/python/astra/data3d.py b/python/astra/data3d.py
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+#-----------------------------------------------------------------------
+#Copyright 2013 Centrum Wiskunde & Informatica, Amsterdam
+#
+#Author: Daniel M. Pelt
+#Contact: D.M.Pelt@cwi.nl
+#Website: http://dmpelt.github.io/pyastratoolbox/
+#
+#
+#This file is part of the Python interface to the
+#All Scale Tomographic Reconstruction Antwerp Toolbox ("ASTRA Toolbox").
+#
+#The Python interface to the ASTRA Toolbox is free software: you can redistribute it and/or modify
+#it under the terms of the GNU General Public License as published by
+#the Free Software Foundation, either version 3 of the License, or
+#(at your option) any later version.
+#
+#The Python interface to the ASTRA Toolbox is distributed in the hope that it will be useful,
+#but WITHOUT ANY WARRANTY; without even the implied warranty of
+#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+#GNU General Public License for more details.
+#
+#You should have received a copy of the GNU General Public License
+#along with the Python interface to the ASTRA Toolbox. If not, see <http://www.gnu.org/licenses/>.
+#
+#-----------------------------------------------------------------------
+from . import data3d_c as d
+
+def create(datatype,geometry,data=None):
+    """Create a 3D object.
+        
+    :param datatype: Data object type, '-vol' or '-sino'.
+    :type datatype: :class:`string`
+    :param geometry: Volume or projection geometry.
+    :type geometry: :class:`dict`
+    :param data: Data to fill the constructed object with, either a scalar or array.
+    :type data: :class:`float` or :class:`numpy.ndarray`
+    :returns: :class:`int` -- the ID of the constructed object.
+    
+    """
+    return d.create(datatype,geometry,data)
+
+def get(i):
+    """Get a 3D object.
+    
+    :param i: ID of object to get.
+    :type i: :class:`int`
+    :returns: :class:`numpy.ndarray` -- The object data.
+    
+    """
+    return d.get(i)
+
+def get_shared(i):
+    """Get a 3D object with memory shared between the ASTRA toolbox and numpy array.
+    
+    :param i: ID of object to get.
+    :type i: :class:`int`
+    :returns: :class:`numpy.ndarray` -- The object data.
+    
+    """
+    return d.get_shared(i)
+
+def get_single(i):
+    """Get a 3D object in single precision.
+    
+    :param i: ID of object to get.
+    :type i: :class:`int`
+    :returns: :class:`numpy.ndarray` -- The object data.
+    
+    """
+    return g.get_single(i)
+
+def store(i,data):
+    """Fill existing 3D object with data.
+    
+    :param i: ID of object to fill.
+    :type i: :class:`int`
+    :param data: Data to fill the object with, either a scalar or array.
+    :type data: :class:`float` or :class:`numpy.ndarray`
+    
+    """
+    return d.store(i,data)
+
+def dimensions(i):
+    """Get dimensions of a 3D object.
+    
+    :param i: ID of object.
+    :type i: :class:`int`
+    :returns: :class:`tuple` -- dimensions of object with ID ``i``.
+    
+    """
+    return d.dimensions(i)
+
+def delete(ids):
+    """Delete a 2D object.
+    
+    :param ids: ID or list of ID's to delete.
+    :type ids: :class:`int` or :class:`list`
+    
+    """
+    return d.delete(ids)
+
+def clear():
+    """Clear all 3D data objects."""
+    return d.clear()
+
+def info():
+    """Print info on 3D objects in memory."""
+    return d.info()