diff --git a/DDCore/python/dd4hep.py b/DDCore/python/dd4hep.py
index d2626136a4b45bedb0ef42cc9ba13c076b296bdf..7528f711459fbc2f0c9644baa59cd80fe00acdaa 100644
--- a/DDCore/python/dd4hep.py
+++ b/DDCore/python/dd4hep.py
@@ -8,5 +8,6 @@
 # For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
 #
 #==========================================================================
+from __future__ import absolute_import
 from dd4hep_base import *
 import_units(__import__(__name__))
diff --git a/DDCore/python/dd4hepFactories.py b/DDCore/python/dd4hepFactories.py
index 04a413f0f83e15084d34beb1bc86e073eb7d390c..01c23b3f3977b03c06ecec5b54a6babf31c26fc6 100755
--- a/DDCore/python/dd4hepFactories.py
+++ b/DDCore/python/dd4hepFactories.py
@@ -10,6 +10,7 @@
 #
 #==========================================================================
 
+from __future__ import absolute_import
 import os, sys, optparse, logging
 
 class ComponentDumper:
diff --git a/DDCore/python/dd4hep_base.py b/DDCore/python/dd4hep_base.py
index 708373be8e6199a7cffc943b26da369cf8abd91c..ca3f1a1f7e38821660c4dbd703f83f5ebc32c070 100644
--- a/DDCore/python/dd4hep_base.py
+++ b/DDCore/python/dd4hep_base.py
@@ -8,6 +8,7 @@
 # For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
 #
 #==========================================================================
+from __future__ import absolute_import
 import imp, logging
 
 logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.DEBUG)
diff --git a/DDCore/python/lcdd.py b/DDCore/python/lcdd.py
index 74282ca69849bb16e464276bcaf3e589d7e32ae0..918dbed06611802f342a87063d046c6fd1cd5e60 100644
--- a/DDCore/python/lcdd.py
+++ b/DDCore/python/lcdd.py
@@ -8,7 +8,8 @@
 # For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
 #
 #==========================================================================
-
+from __future__ import absolute_import
+
 from math import cos, sin, pi, tan
 from os import path, listdir
 from functools import partial
diff --git a/DDDigi/python/DDDigi.py b/DDDigi/python/DDDigi.py
index 8f4879de994c5a21ddf39851712be46c46703117..02e1a12e497d39e8fe8ed4a23b583b72cdd22b7e 100644
--- a/DDDigi/python/DDDigi.py
+++ b/DDDigi/python/DDDigi.py
@@ -8,6 +8,7 @@
 # For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
 #
 #==========================================================================
+from __future__ import absolute_import
 import logging
 from dd4hep_base import *
 
diff --git a/DDG4/examples/CLICSidSimuLCIO.py b/DDG4/examples/CLICSidSimuLCIO.py
index 80e060dc5bf68b0057e24c7b028e3a67ef85e3dc..d9707de066993c883cd3e7d9a0117b6316bb48aa 100644
--- a/DDG4/examples/CLICSidSimuLCIO.py
+++ b/DDG4/examples/CLICSidSimuLCIO.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/DDG4/examples/CLICSidSimuMarkus.py b/DDG4/examples/CLICSidSimuMarkus.py
index e7a0e9de292a9fb5ed96c1bb9cdd8c57f6164df0..042c91109eacfa6c3c84f9db286d393b5b0d7a13 100644
--- a/DDG4/examples/CLICSidSimuMarkus.py
+++ b/DDG4/examples/CLICSidSimuMarkus.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, time, logging, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/DDG4/examples/SiDSim.py b/DDG4/examples/SiDSim.py
index 8c8d8fbf8827bb8871a77b31517f78196e781e7e..74b606c4270827238c73e8a7149d7d047ee17271 100644
--- a/DDG4/examples/SiDSim.py
+++ b/DDG4/examples/SiDSim.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, time, logging, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/DDG4/examples/SiDSim_MT.py b/DDG4/examples/SiDSim_MT.py
index d6251ce30e115920e3f4938ecc64a26762a363fd..5b67aa2334809db120f0f125a7310e17987dc003 100644
--- a/DDG4/examples/SiDSim_MT.py
+++ b/DDG4/examples/SiDSim_MT.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, time, logging, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/DDG4/examples/SiD_Markus.py b/DDG4/examples/SiD_Markus.py
index 48a242afb89d051cde48868cf0edce65dfd659e3..50c5d664c693778b89191c84aeb7e855c17799f5 100644
--- a/DDG4/examples/SiD_Markus.py
+++ b/DDG4/examples/SiD_Markus.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, time, logging, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/DDG4/examples/readHEPMC.py b/DDG4/examples/readHEPMC.py
index 98728e9f04b695b1519ceae01b7ffcca712e7a2a..be03ebc456d83d547cc70eb6ae1748f05d683a25 100644
--- a/DDG4/examples/readHEPMC.py
+++ b/DDG4/examples/readHEPMC.py
@@ -6,6 +6,7 @@ dd4hep simulation example setup using the python configuration
 @version 1.0
 
 """
+from __future__ import absolute_import
 import logging
 logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.DEBUG)
 
diff --git a/DDG4/python/DDG4.py b/DDG4/python/DDG4.py
index 00f37b3f2e0a8194a1da59f19e4111de8bc1f73b..c835398eeab7e7e325a6195d03e4dc61d4758798 100644
--- a/DDG4/python/DDG4.py
+++ b/DDG4/python/DDG4.py
@@ -8,6 +8,7 @@
 # For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
 #
 #==========================================================================
+from __future__ import absolute_import
 import logging
 from dd4hep_base import *
 
diff --git a/DDG4/python/DDSim/DD4hepSimulation.py b/DDG4/python/DDSim/DD4hepSimulation.py
index 133bde70a0116694c462238dd514c39bf7965b5a..8960bc3a6db3655b229765c58cd72c73f4c1826f 100644
--- a/DDG4/python/DDSim/DD4hepSimulation.py
+++ b/DDG4/python/DDSim/DD4hepSimulation.py
@@ -6,6 +6,7 @@ Based on M. Frank and F. Gaede runSim.py
    @version 0.1
 
 """
+from __future__ import absolute_import
 __RCSID__ = "$Id$"
 from g4units import *
 import argparse
diff --git a/DDG4/python/DDSim/Helper/Action.py b/DDG4/python/DDSim/Helper/Action.py
index 2252840e01ca3296d662cd75b4ae276f9cbb2ffe..e8b471e8f3f74adb95656b2eb6961a365f9e998f 100644
--- a/DDG4/python/DDSim/Helper/Action.py
+++ b/DDG4/python/DDSim/Helper/Action.py
@@ -1,6 +1,7 @@
 """Helper object for SD Actions
 """
 
+from __future__ import absolute_import
 from DDSim.Helper.ConfigHelper import ConfigHelper
 
 class Action( ConfigHelper ):
diff --git a/DDG4/python/DDSim/Helper/ConfigHelper.py b/DDG4/python/DDSim/Helper/ConfigHelper.py
index 89f5c3e39d7a96c82af96626fe2505b725dd7a4e..172ec52d5ac48bdc72529133212eb51bd59f4d4a 100644
--- a/DDG4/python/DDSim/Helper/ConfigHelper.py
+++ b/DDG4/python/DDSim/Helper/ConfigHelper.py
@@ -12,6 +12,7 @@ call for the parser object create an additional member::
 
 """
 
+from __future__ import absolute_import
 from pprint import pprint
 
 class ConfigHelper( object ):
diff --git a/DDG4/python/DDSim/Helper/Filter.py b/DDG4/python/DDSim/Helper/Filter.py
index fe724f7c0a80a3067be339ec2780b913db471923..0b87a087a6c8d7a98dbfafd1e9aeb0440396eced 100644
--- a/DDG4/python/DDSim/Helper/Filter.py
+++ b/DDG4/python/DDSim/Helper/Filter.py
@@ -5,6 +5,7 @@ The default filters are a GeantinoRejector and a 1keV minimum energy cut
 
 """
 
+from __future__ import absolute_import
 from DDSim.Helper.ConfigHelper import ConfigHelper
 from g4units import keV
 
diff --git a/DDG4/python/DDSim/Helper/GuineaPig.py b/DDG4/python/DDSim/Helper/GuineaPig.py
index 89864d8ff39d27f4c7a91d42980ed7dfb4b5c7be..146ebec21dc5e34e2db679cc61f7f560618930d3 100644
--- a/DDG4/python/DDSim/Helper/GuineaPig.py
+++ b/DDG4/python/DDSim/Helper/GuineaPig.py
@@ -1,5 +1,6 @@
 """Helper object for GuineaPig InputFile Parameters"""
 
+from __future__ import absolute_import
 from DDSim.Helper.Input import Input
 
 class GuineaPig( Input ):
diff --git a/DDG4/python/DDSim/Helper/Gun.py b/DDG4/python/DDSim/Helper/Gun.py
index d5af78bd97352838c8c72d8aa9826a273460d165..ccba67ede1d5d307780c96d5eb319c13822cdfd3 100644
--- a/DDG4/python/DDSim/Helper/Gun.py
+++ b/DDG4/python/DDSim/Helper/Gun.py
@@ -1,5 +1,6 @@
 """Helper object for particle gun properties"""
 
+from __future__ import absolute_import
 from DDSim.Helper.ConfigHelper import ConfigHelper
 from g4units import GeV
 
diff --git a/DDG4/python/DDSim/Helper/Input.py b/DDG4/python/DDSim/Helper/Input.py
index d36512d6ebb5e5904be3cf3075ef5381f4f573e2..68f8351a5cda154e693f6db2dd87957a0bb3d1ad 100644
--- a/DDG4/python/DDSim/Helper/Input.py
+++ b/DDG4/python/DDSim/Helper/Input.py
@@ -1,5 +1,6 @@
 """Base class for inputfile parameters"""
 
+from __future__ import absolute_import
 from DDSim.Helper.ConfigHelper import ConfigHelper
 
 class Input( ConfigHelper ):
diff --git a/DDG4/python/DDSim/Helper/LCIO.py b/DDG4/python/DDSim/Helper/LCIO.py
index fa66d9329f873b82606638ca5cee616df098e37a..3cfc4b2f8adfa110e7b68e8d6cf21d4a9d95a057 100644
--- a/DDG4/python/DDSim/Helper/LCIO.py
+++ b/DDG4/python/DDSim/Helper/LCIO.py
@@ -1,5 +1,6 @@
 """Helper object for files containing one or more MCParticle collections"""
 
+from __future__ import absolute_import
 from DDSim.Helper.Input import Input
 
 class LCIO( Input ):
diff --git a/DDG4/python/DDSim/Helper/MagneticField.py b/DDG4/python/DDSim/Helper/MagneticField.py
index ebe5aeabe2f7aad121e9242c9891c4c544f31d00..9c6f13a78ed582724853b070e2a3a68490a51ef0 100644
--- a/DDG4/python/DDSim/Helper/MagneticField.py
+++ b/DDG4/python/DDSim/Helper/MagneticField.py
@@ -1,4 +1,5 @@
 """Helper object for Magnetic Field properties"""
+from __future__ import absolute_import
 from g4units import mm, m
 from DDSim.Helper.ConfigHelper import ConfigHelper
 
diff --git a/DDG4/python/DDSim/Helper/Meta.py b/DDG4/python/DDSim/Helper/Meta.py
index 600e80ab456dac5eab134eeea9b7df29b24b3d4e..0e4370659c2aa9f0b8f73402793c17bb9f447aa2 100644
--- a/DDG4/python/DDSim/Helper/Meta.py
+++ b/DDG4/python/DDSim/Helper/Meta.py
@@ -1,5 +1,6 @@
 """Helper object for configuring the LCIO output file (meta)"""
 
+from __future__ import absolute_import
 import datetime
 import os
 
diff --git a/DDG4/python/DDSim/Helper/Output.py b/DDG4/python/DDSim/Helper/Output.py
index 63e42895ec1efb33d24ec2d25fd3b3c406dfc80d..58b4222213db134b4a6d937dbc2e1ae2b488cf9d 100644
--- a/DDG4/python/DDSim/Helper/Output.py
+++ b/DDG4/python/DDSim/Helper/Output.py
@@ -1,5 +1,6 @@
 """Dummy helper object for particle gun properties"""
 
+from __future__ import absolute_import
 from DDSim.Helper.ConfigHelper import ConfigHelper
 from DDSim.DD4hepSimulation import outputLevel
 
diff --git a/DDG4/python/DDSim/Helper/ParticleHandler.py b/DDG4/python/DDSim/Helper/ParticleHandler.py
index ad7711ceec2a5d1d60e5b762f630f8e0a1fd4197..d9a5278834a8c3fbbaa575bf004e3e014d5d6869 100644
--- a/DDG4/python/DDSim/Helper/ParticleHandler.py
+++ b/DDG4/python/DDSim/Helper/ParticleHandler.py
@@ -1,4 +1,5 @@
 """Configuration Helper for ParticleHandler"""
+from __future__ import absolute_import
 from g4units import MeV, mm
 
 from DDSim.Helper.ConfigHelper import ConfigHelper
diff --git a/DDG4/python/DDSim/Helper/Physics.py b/DDG4/python/DDSim/Helper/Physics.py
index c6943132ba08c4ded62c30b70004afd4494812ac..11cd2e84499b12cb066fcabe0c618fb986bf4117 100644
--- a/DDG4/python/DDSim/Helper/Physics.py
+++ b/DDG4/python/DDSim/Helper/Physics.py
@@ -1,5 +1,6 @@
 """Helper object for physicslist properties"""
 
+from __future__ import absolute_import
 import os
 
 from DDSim.Helper.ConfigHelper import ConfigHelper
diff --git a/DDG4/python/DDSim/Helper/Random.py b/DDG4/python/DDSim/Helper/Random.py
index ec6a67a7aace2cbffd9dda4067217153065169e4..d66d8d618d360691565912660f914bbf9a29f0cc 100644
--- a/DDG4/python/DDSim/Helper/Random.py
+++ b/DDG4/python/DDSim/Helper/Random.py
@@ -1,5 +1,6 @@
 """Helper object for random number generator objects"""
 
+from __future__ import absolute_import
 import random
 
 from DDSim.Helper.ConfigHelper import ConfigHelper
diff --git a/DDG4/python/SystemOfUnits.py b/DDG4/python/SystemOfUnits.py
index 9ebf1a3ac79306bbb05bb0d0189084f820201be9..895234067c08c40615385ab20600e998ce7a1df1 100644
--- a/DDG4/python/SystemOfUnits.py
+++ b/DDG4/python/SystemOfUnits.py
@@ -13,5 +13,6 @@
 #  The namespace "DD4hep" is deprecated. Please use "dd4hep" instead.
 #
 #==========================================================================
+from __future__ import absolute_import
 from g4units import *
 print 'DEPRECATION WARNING  The namespace "SystemOfUnits" is deprecated. Please use "g4units" instead.'
diff --git a/DDG4/python/checkGeometry.py b/DDG4/python/checkGeometry.py
index c296c012d8bbe41b3259ed81bf21bd348d060d1c..f8d6e8370706ef0561586c384f8c8ca73956e945 100755
--- a/DDG4/python/checkGeometry.py
+++ b/DDG4/python/checkGeometry.py
@@ -10,6 +10,7 @@
 #
 #==========================================================================
 
+from __future__ import absolute_import
 import sys, errno, optparse, logging
 
 logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.DEBUG)
diff --git a/DDG4/python/checkOverlaps.py b/DDG4/python/checkOverlaps.py
index a6a745839d0221dbe879ae1a9480655f13779fa1..f9d105b7de05f54ac4fd3b67081d386636c69dc2 100755
--- a/DDG4/python/checkOverlaps.py
+++ b/DDG4/python/checkOverlaps.py
@@ -10,6 +10,7 @@
 #
 #==========================================================================
 
+from __future__ import absolute_import
 import sys, errno, optparse, logging
 
 logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.DEBUG)
diff --git a/DDG4/python/g4MaterialScan.py b/DDG4/python/g4MaterialScan.py
index cfee0995ea0f29051a421f8dedf21aa6b9ce7c92..85f7c83e428c76bd095c117c6496901a92f9aa0e 100644
--- a/DDG4/python/g4MaterialScan.py
+++ b/DDG4/python/g4MaterialScan.py
@@ -10,6 +10,7 @@
 #
 #==========================================================================
 
+from __future__ import absolute_import
 import os, sys, errno, optparse, logging
 
 logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.DEBUG)
diff --git a/DDRec/python/DDRec.py b/DDRec/python/DDRec.py
index 1496145cd98fea6a42c84783f0cf3107241f178c..9d99e5e2e6208c39d7d45ed28ae4ef84f4c429dc 100644
--- a/DDRec/python/DDRec.py
+++ b/DDRec/python/DDRec.py
@@ -8,6 +8,7 @@
 # For the list of contributors see $DD4hepINSTALL/doc/CREDITS.
 #
 #==========================================================================
+from __future__ import absolute_import
 import logging
 import dd4hep as core
 
diff --git a/DDRec/python/dumpDetectorData.py b/DDRec/python/dumpDetectorData.py
index 443a18931d59a0751d5ec3bea7d8395bb30494fb..ee10b41f850807ac074013b4103dcd038c392e43 100644
--- a/DDRec/python/dumpDetectorData.py
+++ b/DDRec/python/dumpDetectorData.py
@@ -10,6 +10,7 @@
 #
 #==========================================================================
 
+from __future__ import absolute_import
 import sys, errno, optparse, logging
 
 
diff --git a/GaudiPluginService/python/GaudiPluginService/cpluginsvc.py b/GaudiPluginService/python/GaudiPluginService/cpluginsvc.py
index 3b838fe9c9f5f7cc0d879bff544d01bc6669641f..b8cde1c66246a15dac872e8365d3761e95b7f8f6 100644
--- a/GaudiPluginService/python/GaudiPluginService/cpluginsvc.py
+++ b/GaudiPluginService/python/GaudiPluginService/cpluginsvc.py
@@ -1,4 +1,5 @@
 # cpluginsvc is a ctypes-based wrapper for the C-exposed API of GaudiPluginService
+from __future__ import absolute_import
 __doc__ = '''
 cpluginsvc is a ctypes-based wrapper for the C-API of the GaudiPluginService.
 
diff --git a/etc/CreateParsers.py b/etc/CreateParsers.py
index f51aa68c6f8754e1eeb50078201bcfa31bc93809..52ce9656157ff226f378ba5ee1d9d0b2d58110bc 100644
--- a/etc/CreateParsers.py
+++ b/etc/CreateParsers.py
@@ -10,6 +10,7 @@ python CreateParsers.py
 
 """
 
+from __future__ import absolute_import
 import os
 
 LICENSE ="""// $Id$
diff --git a/examples/CLICSiD/scripts/CLICMagField.py b/examples/CLICSiD/scripts/CLICMagField.py
index 0798b26c1badc9d5a012e3f0e3e99564e9644596..3d1f221e576e75ea80b1a860ef4bb31b38853383 100644
--- a/examples/CLICSiD/scripts/CLICMagField.py
+++ b/examples/CLICSiD/scripts/CLICMagField.py
@@ -5,6 +5,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 if __name__ == "__main__":
   import CLICSid
   sid = CLICSid.CLICSid().loadGeometry()
diff --git a/examples/CLICSiD/scripts/CLICPhysics.py b/examples/CLICSiD/scripts/CLICPhysics.py
index 43e2d1d2cb1fc2436f4c2fe91033b1d23d284e37..87d4d891074d6454db63a1a21e550733dcfe2091 100644
--- a/examples/CLICSiD/scripts/CLICPhysics.py
+++ b/examples/CLICSiD/scripts/CLICPhysics.py
@@ -5,6 +5,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 if __name__ == "__main__":
   import CLICSid
   sid = CLICSid.CLICSid().loadGeometry()
diff --git a/examples/CLICSiD/scripts/CLICRandom.py b/examples/CLICSiD/scripts/CLICRandom.py
index 8d04b5b431abcf647338d908009f7397fa9e9fe9..d25129e598a2ea6398ef31746c1309372dc2053f 100644
--- a/examples/CLICSiD/scripts/CLICRandom.py
+++ b/examples/CLICSiD/scripts/CLICRandom.py
@@ -5,6 +5,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 from ROOT import TRandom
 from ROOT import gRandom
 
diff --git a/examples/CLICSiD/scripts/CLICSiDScan.py b/examples/CLICSiD/scripts/CLICSiDScan.py
index c19bb384b12d93ac4a6bf4baad9bdd0c75ca9052..90115d1a325784d13389f2e14c3b3197cf4b4285 100644
--- a/examples/CLICSiD/scripts/CLICSiDScan.py
+++ b/examples/CLICSiD/scripts/CLICSiDScan.py
@@ -6,6 +6,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 def run():
   import os, sys, logging, DDG4, CLICSid, g4units
 
diff --git a/examples/CLICSiD/scripts/CLICSiD_LoadROOTGeo.py b/examples/CLICSiD/scripts/CLICSiD_LoadROOTGeo.py
index 5b3fa6649c033004b50d2c3d2f90f42e558e7e78..ff23c8b49c2e91c2345c23dccde59eac8b6f0a70 100644
--- a/examples/CLICSiD/scripts/CLICSiD_LoadROOTGeo.py
+++ b/examples/CLICSiD/scripts/CLICSiD_LoadROOTGeo.py
@@ -7,6 +7,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 def run():
   import sys, logging, CLICSid, DDG4
   from DDG4 import OutputLevel as Output
diff --git a/examples/CLICSiD/scripts/CLICSid.py b/examples/CLICSiD/scripts/CLICSid.py
index 9c4de587afc4c6380de1812f2b51502ce7d60c70..ab900e28db0aab6bc2469bbd37acc602f43cef2b 100644
--- a/examples/CLICSiD/scripts/CLICSid.py
+++ b/examples/CLICSiD/scripts/CLICSid.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import sys, logging, DDG4
 from g4units import *
 
diff --git a/examples/CLICSiD/scripts/CLIC_G4Gun.py b/examples/CLICSiD/scripts/CLIC_G4Gun.py
index 6964c417406eadba0c55cd053ea7e187c76a2a6e..bc13b19522ccb4118934c82fcd3e863ca551651b 100644
--- a/examples/CLICSiD/scripts/CLIC_G4Gun.py
+++ b/examples/CLICSiD/scripts/CLIC_G4Gun.py
@@ -7,6 +7,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 def run():
   import logging, CLICSid, DDG4
   from DDG4 import OutputLevel as Output
diff --git a/examples/CLICSiD/scripts/CLIC_GDML.py b/examples/CLICSiD/scripts/CLIC_GDML.py
index d6b8209acb6a95070002b2d6d993342760cdf121..0f3777d7490ea15eda444ce89c04a5b52100bb0f 100644
--- a/examples/CLICSiD/scripts/CLIC_GDML.py
+++ b/examples/CLICSiD/scripts/CLIC_GDML.py
@@ -6,6 +6,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 def run():
   from g4units import *
   import logging, CLICSid, DDG4
diff --git a/examples/CLICSiD/scripts/testDDPython.py b/examples/CLICSiD/scripts/testDDPython.py
index b162a7d0256ac4fd8f95560852c8ecfe67d84963..dcd6f273697cb4395bea9775b3a928e0464efe24 100644
--- a/examples/CLICSiD/scripts/testDDPython.py
+++ b/examples/CLICSiD/scripts/testDDPython.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 from ROOT import gSystem
 
 import os, logging, platform
diff --git a/examples/ClientTests/scripts/Assemblies.py b/examples/ClientTests/scripts/Assemblies.py
index ccc6050c2406af11087217dca7e94a2468a0d4d6..a916590d7ccb5e9abbfd5d51b0acd36419d7bcf3 100644
--- a/examples/ClientTests/scripts/Assemblies.py
+++ b/examples/ClientTests/scripts/Assemblies.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import os, sys, time, DDG4
 from SystemOfUnits import *
 #
diff --git a/examples/ClientTests/scripts/DDG4TestSetup.py b/examples/ClientTests/scripts/DDG4TestSetup.py
index 0efbc62d4ca3f2460731295a5d75b05472151973..35a5a3310a2b112a603da58af52cee8c9a238d6d 100644
--- a/examples/ClientTests/scripts/DDG4TestSetup.py
+++ b/examples/ClientTests/scripts/DDG4TestSetup.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import os, sys, time, logging, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/ClientTests/scripts/FCC_Hcal.py b/examples/ClientTests/scripts/FCC_Hcal.py
index 6ce04c323dc22bd186983ea9ad0e657b002076f8..886467bb75a1de06c5fd028a92452d13ad53bd40 100644
--- a/examples/ClientTests/scripts/FCC_Hcal.py
+++ b/examples/ClientTests/scripts/FCC_Hcal.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import os, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/ClientTests/scripts/LheD_tracker.py b/examples/ClientTests/scripts/LheD_tracker.py
index 85f7026d63db0eea9503556c96f8b2495d7dfcc6..afe3a1282b0aaed129995fe4b8f55e575a5b0a77 100644
--- a/examples/ClientTests/scripts/LheD_tracker.py
+++ b/examples/ClientTests/scripts/LheD_tracker.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, sys, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/ClientTests/scripts/MiniTel.py b/examples/ClientTests/scripts/MiniTel.py
index 9a5ee8261e62921b1c12e46588f2688616934c72..48b45399d5a2dac7ba9aa458d40318a4e257fb01 100644
--- a/examples/ClientTests/scripts/MiniTel.py
+++ b/examples/ClientTests/scripts/MiniTel.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import os, sys, DDG4
 #
 """
diff --git a/examples/ClientTests/scripts/MiniTelEnergyDeposits.py b/examples/ClientTests/scripts/MiniTelEnergyDeposits.py
index b1fea411925e7bb38e8ce365f2ec61ee2a210471..cbe975d2e5958c6e33e9b5f84a7943aa9fcd36f4 100644
--- a/examples/ClientTests/scripts/MiniTelEnergyDeposits.py
+++ b/examples/ClientTests/scripts/MiniTelEnergyDeposits.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import sys, time, DDG4, MiniTelSetup
 from DDG4 import OutputLevel as Output
 #
diff --git a/examples/ClientTests/scripts/MiniTelRegions.py b/examples/ClientTests/scripts/MiniTelRegions.py
index 5e19fe4d4044718606ee1e632f9bc0836cd659a2..5bc15ec85028480f7ba0dedfec8d6ab49c122ab2 100644
--- a/examples/ClientTests/scripts/MiniTelRegions.py
+++ b/examples/ClientTests/scripts/MiniTelRegions.py
@@ -5,6 +5,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 if __name__ == "__main__":
   from MiniTelSetup import Setup as MiniTel
   import logging
diff --git a/examples/ClientTests/scripts/MiniTelSetup.py b/examples/ClientTests/scripts/MiniTelSetup.py
index c78613e2b1da33b0382c10ea4b10542bec6fd513..b986563de6f512d315adfb129027b48e9d4f5068 100644
--- a/examples/ClientTests/scripts/MiniTelSetup.py
+++ b/examples/ClientTests/scripts/MiniTelSetup.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import os, time, DDG4TestSetup
 """
 
diff --git a/examples/ClientTests/scripts/MultiCollections.py b/examples/ClientTests/scripts/MultiCollections.py
index c6fd05f831dca625212bbf4b23186a4f2ff7bf1f..732317e25ee8a93c9ae7696483f37a5e3f7b81eb 100644
--- a/examples/ClientTests/scripts/MultiCollections.py
+++ b/examples/ClientTests/scripts/MultiCollections.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import os, sys, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/ClientTests/scripts/MultiSegmentCollections.py b/examples/ClientTests/scripts/MultiSegmentCollections.py
index ceb86b584c08bc41edaa369288757eccbb874ed1..3b5c1a79885b7c888b8ca933557690738027fb65 100644
--- a/examples/ClientTests/scripts/MultiSegmentCollections.py
+++ b/examples/ClientTests/scripts/MultiSegmentCollections.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import os, sys, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/ClientTests/scripts/NestedDetectors.py b/examples/ClientTests/scripts/NestedDetectors.py
index c2a3f66b0164c28807e018087d31daeb4006017b..234a4dd7d5c987891eb11c4f3a082d376f0761ee 100644
--- a/examples/ClientTests/scripts/NestedDetectors.py
+++ b/examples/ClientTests/scripts/NestedDetectors.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import os, sys, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/ClientTests/scripts/SiliconBlock.py b/examples/ClientTests/scripts/SiliconBlock.py
index 19eeb9885872e26595048716eb96da36a995b5f7..96269fdd4be795281d78b62c8a713967ad335025 100644
--- a/examples/ClientTests/scripts/SiliconBlock.py
+++ b/examples/ClientTests/scripts/SiliconBlock.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, sys, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/ClientTests/scripts/TrackingRegion.py b/examples/ClientTests/scripts/TrackingRegion.py
index 304f8ff4991452b07dfd6e2543eb176fe830ea0f..8b4c808e5cab8df7ad45162dac362dbe85c8305a 100644
--- a/examples/ClientTests/scripts/TrackingRegion.py
+++ b/examples/ClientTests/scripts/TrackingRegion.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, sys, time, DDG4
 #
 """
diff --git a/examples/DDCMS/scripts/CMSTrackerSim.py b/examples/DDCMS/scripts/CMSTrackerSim.py
index caea821ea138b5b7ecb7fde92435e89901913d0b..40c03f748cb19b491506b6a6ddc573f6a2e4e0be 100644
--- a/examples/DDCMS/scripts/CMSTrackerSim.py
+++ b/examples/DDCMS/scripts/CMSTrackerSim.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import os, sys, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/DDCodex/python/CODEX-b-alone.py b/examples/DDCodex/python/CODEX-b-alone.py
index 9b45611de8e9665a787037a190518b7afd59b5b1..7c8b824a1b7ead61b33e778d55b2700a9068660c 100755
--- a/examples/DDCodex/python/CODEX-b-alone.py
+++ b/examples/DDCodex/python/CODEX-b-alone.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, sys, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/DDCodex/python/GeoExtract.py b/examples/DDCodex/python/GeoExtract.py
index 76a586beade25034ad37d4dfbb1fad48fd4cf2a4..675cdf5a142855eb6213690fa71b65cc01d4d600 100755
--- a/examples/DDCodex/python/GeoExtract.py
+++ b/examples/DDCodex/python/GeoExtract.py
@@ -4,6 +4,7 @@
 # Syntax is:
 #   gaudirun.py Brunel-Default.py <someDataFiles>.py
 ###############################################################################
+from __future__ import absolute_import
 from Gaudi.Configuration  import *
 from Configurables import LHCbConfigurableUser, LHCbApp, CondDB, ToolSvc, EventSelector
 from Configurables import LoadDD4hepDet, LbDD4hepExample
diff --git a/examples/DDDigi/scripts/TestFramework.py b/examples/DDDigi/scripts/TestFramework.py
index 8eda36d57621a19cdbb062a51a382451df121b11..b4a6a012bd462e9ce2c292d6d1a439b5ff67d407 100644
--- a/examples/DDDigi/scripts/TestFramework.py
+++ b/examples/DDDigi/scripts/TestFramework.py
@@ -1,5 +1,6 @@
 
 
+from __future__ import absolute_import
 import os, sys, logging, DDDigi
 
 DDDigi.setPrintFormat('%-32s %5s %s')
diff --git a/examples/DDG4_MySensDet/scripts/MyTrackerSD_sim.py b/examples/DDG4_MySensDet/scripts/MyTrackerSD_sim.py
index 366a622793ad4052c22b5c10401398c9d528ca81..c83f35691a7bf0b7e0718a1ca0c18348ba7e331b 100644
--- a/examples/DDG4_MySensDet/scripts/MyTrackerSD_sim.py
+++ b/examples/DDG4_MySensDet/scripts/MyTrackerSD_sim.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, sys, time, DDG4, dd4hep
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *
diff --git a/examples/LHeD/scripts/LHeD.py b/examples/LHeD/scripts/LHeD.py
index d2bd658ed20df5fb0db192f8df353cb98e10b016..2c57089b5beb375c8f393bd12ad3899b686026da 100644
--- a/examples/LHeD/scripts/LHeD.py
+++ b/examples/LHeD/scripts/LHeD.py
@@ -1,3 +1,4 @@
+from __future__ import absolute_import
 import sys, logging, DDG4
 from SystemOfUnits import *
 
diff --git a/examples/LHeD/scripts/LHeDMagField.py b/examples/LHeD/scripts/LHeDMagField.py
index 553d0bad700807a6de9f8b7dd5d817132a4cfee7..e8aec740571308abc6b74f3f769a485e63fdf979 100644
--- a/examples/LHeD/scripts/LHeDMagField.py
+++ b/examples/LHeD/scripts/LHeDMagField.py
@@ -5,6 +5,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 if __name__ == "__main__":
   import LHeD
   lhed = LHeD.LHeD().loadGeometry()
diff --git a/examples/LHeD/scripts/LHeDPhysics.py b/examples/LHeD/scripts/LHeDPhysics.py
index a617a2ef937917395b4749609948f1f02a3bb6ff..d568ef0ca93c7a33ac3df720167297d0b6b55edc 100644
--- a/examples/LHeD/scripts/LHeDPhysics.py
+++ b/examples/LHeD/scripts/LHeDPhysics.py
@@ -5,6 +5,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 if __name__ == "__main__":
   import LHeD
   lhed = LHeD.LHeD().loadGeometry()
diff --git a/examples/LHeD/scripts/LHeDRandom.py b/examples/LHeD/scripts/LHeDRandom.py
index 60d565a98c3287ccfbc2d1c187c33409e3de73a3..c34e098430179acfab201ceedf04159609eff51f 100644
--- a/examples/LHeD/scripts/LHeDRandom.py
+++ b/examples/LHeD/scripts/LHeDRandom.py
@@ -5,6 +5,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 from ROOT import TRandom
 from ROOT import gRandom
 
diff --git a/examples/LHeD/scripts/LHeDScan.py b/examples/LHeD/scripts/LHeDScan.py
index 7b50c7dbd8f6ec6f52d9cd3a48ffb0beb40f864b..af90335530333833dfcea0f7a69189867193a492 100644
--- a/examples/LHeD/scripts/LHeDScan.py
+++ b/examples/LHeD/scripts/LHeDScan.py
@@ -6,6 +6,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 def run():
   import os, sys, logging, DDG4, SystemOfUnits
 
diff --git a/examples/LHeD/scripts/LHeD_G4Gun.py b/examples/LHeD/scripts/LHeD_G4Gun.py
index a8ab487261daf19c0db93ada63205b7f7937902b..33ca186a44d9b190514420fca5e706285788706f 100644
--- a/examples/LHeD/scripts/LHeD_G4Gun.py
+++ b/examples/LHeD/scripts/LHeD_G4Gun.py
@@ -7,6 +7,7 @@
    @version 1.0
 
 """
+from __future__ import absolute_import
 def run():
   import logging, LHeD, DDG4
   from DDG4 import OutputLevel as Output
diff --git a/examples/LHeD/scripts/LheSimu.py b/examples/LHeD/scripts/LheSimu.py
index 4c9cab54db02d8f741777658064c437827641932..4897482f8f1cea0e65eb9ed7c389e6c0c0e65ba8 100644
--- a/examples/LHeD/scripts/LheSimu.py
+++ b/examples/LHeD/scripts/LheSimu.py
@@ -7,6 +7,7 @@
    modified for LHeC
    
 """
+from __future__ import absolute_import
 def run():
   import LHeD, DDG4, os, SystemOfUnits
   from DDG4 import OutputLevel as Output
diff --git a/examples/OpticalSurfaces/scripts/OpNovice.py b/examples/OpticalSurfaces/scripts/OpNovice.py
index e65147be15a8a0d853ed1b893294a87feff02448..0928f2d1e9e9fedc6eee12623f068ef275b00c1c 100644
--- a/examples/OpticalSurfaces/scripts/OpNovice.py
+++ b/examples/OpticalSurfaces/scripts/OpNovice.py
@@ -1,5 +1,6 @@
 #
 #
+from __future__ import absolute_import
 import os, sys, time, DDG4
 from DDG4 import OutputLevel as Output
 from SystemOfUnits import *