def _remove_original_values(_config_vars):
 for k in list(_config_vars):
  if k.startswith(_INITPRE):
   del _config_vars[k]

def _remove_original_values ( _config_vars ) : for k in list ( _config_vars ) : if k . startswith ( _INITPRE ) : del _config_vars [ k ]
remove original unmodified values for testing .