old_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  """
  This file properly imports the open CV libraries and returns them
  as an object. This function goes a longer way to try to find them
  since especially on MacOS X Library Paths are not clearly defined.
  
  This module also removes the code duplication in __init__ and
  opencv_cv
  """
  
  __all__ = ["cv", "cxcore"]
  
  import ctypes
  import sys
  import warnings
  
  def _import_opencv_lib(which="cv"):
      """
      Try to import a shared library of OpenCV.
  
      which - Which library ["cv", "cxcore", "highgui"]
      """
      if sys.platform.startswith("darwin"):
          shared_lib = _tryload_macosx(which)
      elif sys.platform.startswith("linux"):
          libname = 'lib%s.so' % which
      else:
          libname = 'lib%s.dll' % which
  
      try:
          shared_lib = ctypes.CDLL(libname)
      except OSError:
          shared_lib = None
  
      if shared_lib is None:
          warnings.warn(RuntimeWarning(
              'The opencv libraries were not found.  Please ensure that they '
              'are installed and available on the system path. '))
      return shared_lib
  
  def _tryload_macosx(which):
      common_paths = [
          '/lib/',
          '/usr/lib/',
          '/usr/local/lib/',
          '/opt/local/lib/', # MacPorts
          '/sw/lib/', # Fink
      ]
      shared_lib = None
      for path in common_paths:
          try:
              libpath =path + "lib" + which + '.dylib' 
              shared_lib = ctypes.CDLL(path + "lib" + which + '.dylib')
              break
          except OSError, e:
              if "image not found" in e.args[0]:
                  continue
              raise
  
      return shared_lib
  
  
  cv = _import_opencv_lib("cv")
  cxcore = _import_opencv_lib("cxcore")
  
new_contents: #!/usr/bin/env python
  # encoding: utf-8
  
  """
  This file properly imports the open CV libraries and returns them
  as an object. This function goes a longer way to try to find them
  since especially on MacOS X Library Paths are not clearly defined.
  
  This module also removes the code duplication in __init__ and
  opencv_cv
  """
  
  __all__ = ["cv", "cxcore"]
  
  import ctypes
  import sys
  import os.path
  import warnings
  
  def _import_opencv_lib(which="cv"):
      """
      Try to import a shared library of OpenCV.
  
      which - Which library ["cv", "cxcore", "highgui"]
      """
      library_paths = ['',
                       '/lib/',
                       '/usr/lib/',
                       '/usr/local/lib/',
                       '/opt/local/lib/', # MacPorts
                       '/sw/lib/', # Fink
                       ]
  
      if sys.platform.startswith('linux'):
          extensions = ['.so', '.so.1']
      elif sys.platform.startswith("darwin"):
          extension = ['.dylib']
      else:
          extension = ['.dll']
          library_paths = []
  
      lib = 'lib' + which
      shared_lib = None
  
      for path in library_paths:
          for ext in extensions:
              try:
                  shared_lib = ctypes.CDLL(os.path.join(path, lib + ext))
              except OSError:
                  pass
              else:
                  return shared_lib
  
      warnings.warn(RuntimeWarning(
          'The opencv libraries were not found.  Please ensure that they '
          'are installed and available on the system path. '))
  
  cv = _import_opencv_lib("cv")
  cxcore = _import_opencv_lib("cxcore")
  
subject: Unify libcv loader under different platforms.