_safe_write_tac
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.. py:function:: petpal.cli.cli_tac_interpolation._safe_write_tac(tac_times: numpy.ndarray, tac_values: numpy.ndarray, filename: str) -> None

   Writes time-activity curves (TAC) to a file.

   Tries to write a TAC to the specified file and raises an exception if unable to do so. The TAC is expected to be a
   numpy array where the first index corresponds to the times, and the second corresponds to the activity.

   :param tac_times: A numpy array containing the time points of the TAC.
   :type tac_times: np.ndarray
   :param tac_values: A numpy array containing the activity values of the TAC.
   :type tac_values: np.ndarray
   :param filename: The name of the file to write to.
   :type filename: str

   :raises Exception: An error occurred writing the TAC.