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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _trytoget(self, statname, fallback, **kwargs):
 """Helper function to get a stat from ``_current_stats``. If the statistic hasn't been calculated, ``_current_stats`` will raise an ``AttributeError``. In that case, the ``fallback`` function will be called. If that call is successful, the ``statname`` will be added to ``_current_stats`` with the returned value. Parameters statname : str The stat to get from ``current_stats``. fallback : method of self The function to call if the property call fails. \**kwargs : Any other keyword arguments are passed through to the function. Returns ------- float : The value of the property. """

        try:
            return getattr(self._current_stats, statname)
        except AttributeError:
            val = fallback(**kwargs)
            setattr(self._current_stats, statname, val)
            return val