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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 _fetch_dimensions(self, dataset):
 """ Iterate through semesters, counties and municipalities. """

        yield Dimension(u"school")
        yield Dimension(u"year",
                        datatype="year")
        yield Dimension(u"semester",
                        datatype="academic_term",
                        dialect="swedish")  # HT/VT
        yield Dimension(u"municipality",
                        datatype="year",
                        domain="sweden/municipalities")