def sysmis(self):
        """This function returns the IBM SPSS Statistics system-missing
        value ($SYSMIS) for the host system (also called 'NA' in other
        systems)."""
        try:
            sysmis = -1 * sys.float_info[0]  # Python 2.6 and higher.
        except AttributeError:
            self.spssio.spssSysmisVal.restype = c_float
            sysmis = self.spssio.spssSysmisVal()
        return sysmis
This function returns the IBM SPSS Statistics system-missing
        value ($SYSMIS) for the host system (also called 'NA' in other
        systems).
recipes/Python/577811_Pythreader__writer_spss_sav_files_Linux_Mac_/recipe-577811.py