def rv(self, new_rv=None):
    '\n        Gets or sets whether this variable has record variance\n\n        If the variance is unknown, True is assumed\n        (this replicates the apparent behavior of the CDF library on\n        variable creation).\n\n        Other Parameters\n        ================\n        new_rv : boolean\n            True to change to record variance, False to change to NRV,\n            unspecified to simply check variance.\n\n        Returns\n        =======\n        out : Boolean\n            True if record varying, False if NRV\n        '
    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)
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
def rv(self, new_rv=None):
    '\n        Gets or sets whether this variable has record variance\n\n        If the variance is unknown, True is assumed\n        (this replicates the apparent behavior of the CDF library on\n        variable creation).\n\n        Other Parameters\n        ================\n        new_rv : boolean\n            True to change to record variance, False to change to NRV,\n            unspecified to simply check variance.\n\n        Returns\n        =======\n        out : Boolean\n            True if record varying, False if NRV\n        '
    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)