def close(self):
        super(SpeStack, self).close()
        self._file.close()
nbins* are the number of bins and should be set to None if they do not exist
dataset/ETHPy150Open soft-matter/pims/pims/spe_stack.py/SpeStack.close--crossover with--dataset/ETHPy150Open bolme/pyvision/src/pyvision/other/color.py/Histogram.__init__