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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 merge(self, other):
 """Merge two sets of coordinates to create a new Dataset The method implements the logic used for joining coordinates in the result of a binary operation performed on xarray objects: - If two index coordinates conflict (are not equal), an exception is raised. You must align your data before passing it to this method. - If an index coordinate and a non-index coordinate conflict, the non- index coordinate is dropped. - If two non-index coordinates conflict, both are dropped. Parameters other : DatasetCoordinates or DataArrayCoordinates The coordinates from another dataset or data array. Returns ------- merged : Dataset A new Dataset with merged coordinates. """

        from .dataset import Dataset

        if other is None:
            return self.to_dataset()
        else:
            other_vars = getattr(other, 'variables', other)
            coords = expand_and_merge_variables([self.variables, other_vars])
            return Dataset._from_vars_and_coord_names(coords, set(coords))