Returns a copy of this parameter on one context. Must have been
        initialized on this context before.

        Parameters
        ----------
        ctx : Context
            Desired context.
        Returns
        -------
        NDArray on ctx

def data(self, ctx=None):
        """Returns a copy of this parameter on one context. Must have been
        initialized on this context before.

        Parameters
        ----------
        ctx : Context
            Desired context.
        Returns
        -------
        NDArray on ctx
        """
        d = self._check_and_get(self._data, ctx)
        if self._rate:
            d = nd.Dropout(d, self._rate, self._mode, self._axes)
        return d