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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 head(self, n=None):
 """Returns the first ``n`` rows. .. note:: This method should only be used if the resulting array is expected to be small, as all the data is loaded into the driver's memory. :param n: int, default 1. Number of rows to return. :return: If n is greater than 1, return a list of :class:`Row`. If n is 1, return a single Row. Row(age=2, name=u'Alice') [Row(age=2, name=u'Alice')] """

        if n is None:
            rs = self.head(1)
            return rs[0] if rs else None
        return self.take(n)