code: def setup_environment():
      
      osinter = ostool.get_interface()
      pypath = osinter.get_maya_envpath()
      for p in sys.path:
          pypath = os.pathsep.join((pypath, p))
      os.environ['PYTHONPATH'] = pypath
docs: Set up neccessary environment variables
  
      This appends all path of sys.path to the python path
      so mayapy will find all installed modules.
      We have to make sure, that we use maya libs instead of
      libs of the virtual env. So we insert all the libs for mayapy
      first.
  
      :returns: None
      :rtype: None
      :raises: None