__init__.py 文件源码

def rv(self, new_rv=None):
        """
        Gets or sets whether this variable has record variance

        If the variance is unknown, True is assumed
        (this replicates the apparent behavior of the CDF library on
        variable creation).

        Other Parameters
        ================
        new_rv : boolean
            True to change to record variance, False to change to NRV,
            unspecified to simply check variance.

        Returns
        =======
        out : Boolean
            True if record varying, False if NRV
        """
        if new_rv != None:
            self._call(const.PUT_, const.zVAR_RECVARY_,
                       const.VARY if new_rv else const.NOVARY)
        vary = ctypes.c_long(0)
        self._call(const.GET_, const.zVAR_RECVARY_, ctypes.byref(vary))
        return vary.value != const.NOVARY.value