Passed as keyword arguments to [`numpy.genfromtxt`][1]
        when called by `scipy_data_fitting.Data.load_error`.

        Even if defined here, the `usecols` value will always be reset based
        on `scipy_data_fitting.Data.error_columns` before being passed to [`numpy.genfromtxt`][1].

        If not set, this defaults to a copy of
        `scipy_data_fitting.Data.genfromtxt_args` on first access.

        [1]: http://docs.scipy.org/doc/numpy/reference/generated/numpy.genfromtxt.html

def genfromtxt_args_error(self):
        """
        Passed as keyword arguments to [`numpy.genfromtxt`][1]
        when called by `scipy_data_fitting.Data.load_error`.

        Even if defined here, the `usecols` value will always be reset based
        on `scipy_data_fitting.Data.error_columns` before being passed to [`numpy.genfromtxt`][1].

        If not set, this defaults to a copy of
        `scipy_data_fitting.Data.genfromtxt_args` on first access.

        [1]: http://docs.scipy.org/doc/numpy/reference/generated/numpy.genfromtxt.html
        """
        if not hasattr(self, '_genfromtxt_args_error'):
            self._genfromtxt_args_error = self.genfromtxt_args.copy()
        return self._genfromtxt_args_error