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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 find_one(self, *args, **kwargs):
 """Get a single result from the table. Works just like :py:meth:`find() <dataset.Table.find>` but returns one result, or ``None``. :: row = table.find_one(country='United States') """

        if not self.exists:
            return None

        kwargs['_limit'] = 1
        kwargs['_step'] = None
        resiter = self.find(*args, **kwargs)
        try:
            for row in resiter:
                return row
        finally:
            resiter.close()