""" Just a simple way to import relative modules when calling
      modules with the option -m
      exemple : python -m volia.script
      if script import a module in the same namespace
      this will not work because python will try to
      find a module in the directory of execution, not those of the 
      module file.
  """
  import sys
  import os
  sys.path.append(os.path.dirname(__file__))