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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 drop(self, labels, dim=None):
 """Drop coordinates or index labels from this DataArray. Parameters labels : scalar or list of scalars Name(s) of coordinate variables or index labels to drop. dim : str, optional Dimension along which to drop index labels. By default (if ``dim is None``), drops coordinates rather than index labels. Returns ------- dropped : DataArray """

        if utils.is_scalar(labels):
            labels = [labels]
        ds = self._to_temp_dataset().drop(labels, dim)
        return self._from_temp_dataset(ds)